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2TB USB hard drive for backing up

DISCUSSION Ellwood Blues 8 participants 10 messages Jan 19, 2013 – Jan 22, 2013 9 messages not in the archive

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A message that is not in the archive (sent off-list or not yet received): CAGZeNoc82T0jS=Sg3d2umqi6PjAWjOKjqK2RbuK+QfAzN3Pmww@mail.gmail.com

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#7 lore raw

Hi.

I've had this problem for so long that today after compiling kernel 3.7.3 and not getting any improvements I decided to let you know that some of us still only able to use our GPT 3TB hard disks only on Windows.

On linux only hdparm and gdisk see 3TB but also see some kind of corruption on the alternate GPT which is not true because on windows works flawlessly.

I hope you won't take too long to make it work because this is the only reason I still loging in on windows, before buying this disk I didn't log in on windows at all.

I don't need the EFI drivers to work because the BIOS is not ready for that, I only would like to read and write on the disk which is already half full and cannot do any new experiments trying to fix it with gdisk.

I only need the kernel GPT drivers to work out.

Cheers.

---------- Forwarded message ----------
From: Ellwood Blues <[email protected]>
Date: 2012/6/22
Subject: Fwd: 2TB USB hard drive for backing up
To: [email protected]

---------- Forwarded message ----------
From: Ellwood Blues <[email protected]>
Date: 2012/5/3
Subject: Re: 2TB USB hard drive for backing up
To: [email protected]

2012/4/30 Martin Steigerwald <[email protected]>:

Quoted 32 lines

Am Montag, 30. April 2012 schrieb Ellwood Blues:

Quoted 16 lines

2012/4/30 Martin Steigerwald <[email protected]>:

Quoted 15 lines

Am Montag, 30. April 2012 schrieb Chris Bannister:

Quoted 13 lines · Martin Steigerwald
Quoted 9 lines

Hmmm, I´d avoid those with 4 KB hardware sectors that lie to the OS they have 512 byte sectors. Although I think even those should work. But with 512 byte sectors you have a 2 TB limit when you use MBR partitioning.

3 TB disks with 4 KB sectors both hardware (physical) and software (logical) should just work, provided the Linux is new enough.

On Squeeze use -cu as additional options (see manpage).

Sorry for jumping in here, but I can't figure out (from your post) which command requires the additional options: -cu. Which manpage?

Quoted 7 lines
Quoted 1 line

fdisk. Sorry if I didn´t mention it anywhere in my post.

Thanks, I've tried everything but not success. The problem is that the disk is already half full and aligned with WD tools. I am just waiting for linux to be able to read it and write it as efficiently as Windows does it, at the moment I am not able to read it, which is very frustrating.

I would like to see some information from the disk, like

- relevant stuff from hdparm -I /dev/yourdisk (feel free to skip serial number if you do not want to post it here)
- fdisk -cul /dev/yourdisk
- tail -fn0 /var/log/syslog / dmesg when the kernel detects the disk

Quoted 4 lines

for starters.

You need to use GPT if the disk reports 512 byte sectors to the OS. Thats no problem, when its just a data disk. Try gdisk on the disk.

Sorry for the delay. Her you have what you've asked attached as files and as text on the message:

/dev/sdf:

ATA device, with non-removable media

       Model Number:       WDC WD30EZRX-00MMMB0
       Serial Number:      WD-WCAWZxxxxxxx
       Firmware Revision:  80.00A80
       Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev

2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:

       Logical         max     current
       cylinders       16383   16383
       heads           16      16
       sectors/track   63      63

--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 5860533168
Logical Sector size: 512 bytes
Physical Sector size: 4096 bytes
Logical Sector-0 offset: 0 bytes
device size with M = 1024*1024: 2861588 MBytes
device size with M = 1000*1000: 3000592 MBytes (3000 GB)
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, with device specific minimum R/W multiple sector transfer: Max = 16 Current = 0
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* 64-bit World wide name
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Gen3 signaling speed (6.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* NCQ priority information
DMA Setup Auto-Activate optimization
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT LBA Segment Access (AC2)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
unknown 206[13] (vendor specific)
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
supported: enhanced erase
more than 508min for SECURITY ERASE UNIT. more than 508min for
ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee25b5ed142

       NAA             : 5
       IEEE OUI        : 0014ee
       Unique ID       : 25b5ed142

Checksum: correct

May  3 18:18:50 relampago3 kernel: [ 3931.976021] usb 1-4: new
high-speed USB device number 4 using ehci_hcd
May  3 18:18:50 relampago3 kernel: [ 3932.108900] usb 1-4: New USB
device found, idVendor=152d, idProduct=2329
May  3 18:18:50 relampago3 kernel: [ 3932.108907] usb 1-4: New USB
device strings: Mfr=1, Product=2, SerialNumber=5
May  3 18:18:50 relampago3 kernel: [ 3932.108911] usb 1-4: Product:
USB to ATA/ATAPI Bridge
May  3 18:18:50 relampago3 kernel: [ 3932.108914] usb 1-4: Manufacturer: JMicron
May  3 18:18:50 relampago3 kernel: [ 3932.108917] usb 1-4:
SerialNumber: 152D20329000
May  3 18:18:50 relampago3 kernel: [ 3932.110324] usb-storage 1-4:1.0:
Quirks match for vid 152d pid 2329: 8020
May  3 18:18:50 relampago3 kernel: [ 3932.110360] scsi7 : usb-storage 1-4:1.0
May  3 18:18:50 relampago3 mtp-probe: checking bus 1, device 4:
"/sys/devices/pci0000:00/0000:00:1a.7/usb1/1-4"
May  3 18:18:50 relampago3 mtp-probe: bus: 1, device: 4 was not an MTP device
May  3 18:18:57 relampago3 hddtemp[1872]: /dev/sda: WDC WD2500JS-75NCB3: 34 C
May  3 18:19:06 relampago3 kernel: [ 3948.470324] scsi 7:0:0:0:
Direct-Access     WDC WD30 EZRX-00MMMB0          PQ: 0 ANSI: 2 CCS
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]
1565565872 512-byte logical blocks: (801 GB/746 GiB)
May  3 18:19:06 relampago3 kernel: [ 3948.473541] sd 7:0:0:0: [sdf]
Write Protect is off
May  3 18:19:06 relampago3 kernel: [ 3948.473547] sd 7:0:0:0: [sdf]
Mode Sense: 34 00 00 00
May  3 18:19:06 relampago3 kernel: [ 3948.474287] sd 7:0:0:0: [sdf]
Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
May  3 18:19:06 relampago3 kernel: [ 3948.504915] Alternate GPT is
invalid, using primary GPT.
May  3 18:19:06 relampago3 kernel: [ 3948.504944]  sdf:
May  3 18:19:06 relampago3 kernel: [ 3948.507541] sd 7:0:0:0: [sdf]
Attached SCSI disk
May  3 18:19:06 relampago3 ata_id[3163]: HDIO_GET_IDENTITY failed for

'/dev/sdf': Invalid argument

fdisk: opción inválida -- c
GNU Fdisk 1.2.4
Copyright (C) 1998 - 2006 Free Software Foundation, Inc.
This program is free software, covered by the GNU General Public License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Error: The backup GPT table is corrupt, but the primary appears OK, so that will be used.
o OK
c Cancel
o
Error: Can't have a partition outside the disk!

#8 lore raw
Quoted 15 lines · Ellwood Blues

Hi.

I've had this problem for so long that today after compiling kernel 3.7.3 and not getting any improvements I decided to let you know that some of us still only able to use our GPT 3TB hard disks only on Windows.

On linux only hdparm and gdisk see 3TB but also see some kind of corruption on the alternate GPT which is not true because on windows works flawlessly.

I hope you won't take too long to make it work because this is the only reason I still loging in on windows, before buying this disk I didn't log in on windows at all.

Quoted 7 lines

I don't need the EFI drivers to work because the BIOS is not ready for that, I only would like to read and write on the disk which is already half full and cannot do any new experiments trying to fix it with gdisk.

I only need the kernel GPT drivers to work out.

This has nothing to do with GPT. The problem is that the capacity reported by the drive is truncated:

May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

Is the hdparm produced via the USB interface or by plugging the internal drive into an SATA/eSATA port?

Either way... it is offtopic for the linux-efi mailing list.

-hpa

#9 lore raw

2013/1/21 H. Peter Anvin <[email protected]>:

Quoted 8 lines

This has nothing to do with GPT. The problem is that the capacity reported by the drive is truncated:

May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

Is the hdparm produced via the USB interface or by plugging the internal drive into an SATA/eSATA port?

USB SATA docking station which works out very well on windows.

Quoted 2 lines

Either way... it is offtopic for the linux-efi mailing list.

Sorry! I didn't know this was a list I thought it was the developer email address.

I think that linux-efi is the most appropriate one to send this message because GPT is included in EFI modules, I didn't see any other about GPT.

Cheers.

A message that is not in the archive (sent off-list or not yet received): CAGZeNoeEoecpjvuP9uwphostOcrrAJNerxYGUtjyaMEBn04jxQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org

#11 lore raw

[SCSI and USB lists added, message quoted in entirety]

Quoted 15 lines · Ellwood Blues

Hi.

I've had this problem for so long that today after compiling kernel 3.7.3 and not getting any improvements I decided to let you know that some of us still only able to use our GPT 3TB hard disks only on Windows.

On linux only hdparm and gdisk see 3TB but also see some kind of corruption on the alternate GPT which is not true because on windows works flawlessly.

I hope you won't take too long to make it work because this is the only reason I still loging in on windows, before buying this disk I didn't log in on windows at all.

Quoted 6 lines

I don't need the EFI drivers to work because the BIOS is not ready for that, I only would like to read and write on the disk which is already half full and cannot do any new experiments trying to fix it with gdisk.

I only need the kernel GPT drivers to work out.

The taxonomy is that the device isn't addressable over 2TB. That smells very like a non large block problem. More on this below.

Quoted 169 lines

Cheers.

---------- Forwarded message ----------
From: Ellwood Blues <[email protected]>
Date: 2012/6/22
Subject: Fwd: 2TB USB hard drive for backing up
To: [email protected]

---------- Forwarded message ----------
From: Ellwood Blues <[email protected]>
Date: 2012/5/3
Subject: Re: 2TB USB hard drive for backing up
To: [email protected]

2012/4/30 Martin Steigerwald <[email protected]>:

Quoted 32 lines

Am Montag, 30. April 2012 schrieb Ellwood Blues:

Quoted 16 lines

2012/4/30 Martin Steigerwald <[email protected]>:

Quoted 15 lines

Am Montag, 30. April 2012 schrieb Chris Bannister:

Quoted 13 lines · Martin Steigerwald
Quoted 9 lines

Hmmm, I´d avoid those with 4 KB hardware sectors that lie to the OS they have 512 byte sectors. Although I think even those should work. But with 512 byte sectors you have a 2 TB limit when you use MBR partitioning.

3 TB disks with 4 KB sectors both hardware (physical) and software (logical) should just work, provided the Linux is new enough.

On Squeeze use -cu as additional options (see manpage).

Sorry for jumping in here, but I can't figure out (from your post) which command requires the additional options: -cu. Which manpage?

Quoted 7 lines
Quoted 1 line

fdisk. Sorry if I didn´t mention it anywhere in my post.

Thanks, I've tried everything but not success. The problem is that the disk is already half full and aligned with WD tools. I am just waiting for linux to be able to read it and write it as efficiently as Windows does it, at the moment I am not able to read it, which is very frustrating.

I would like to see some information from the disk, like

- relevant stuff from hdparm -I /dev/yourdisk (feel free to skip serial number if you do not want to post it here)
- fdisk -cul /dev/yourdisk
- tail -fn0 /var/log/syslog / dmesg when the kernel detects the disk

Quoted 4 lines

for starters.

You need to use GPT if the disk reports 512 byte sectors to the OS. Thats no problem, when its just a data disk. Try gdisk on the disk.

Sorry for the delay. Her you have what you've asked attached as files and as text on the message:

/dev/sdf:

ATA device, with non-removable media

       Model Number:       WDC WD30EZRX-00MMMB0
       Serial Number:      WD-WCAWZxxxxxxx
       Firmware Revision:  80.00A80
       Transport:          Serial, SATA 1.0a, SATA II Extensions, SATA Rev

2.5, SATA Rev 2.6, SATA Rev 3.0
Standards:
Supported: 8 7 6 5
Likely used: 8
Configuration:

       Logical         max     current
       cylinders       16383   16383
       heads           16      16
       sectors/track   63      63

--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 5860533168
Logical Sector size: 512 bytes
Physical Sector size: 4096 bytes
Logical Sector-0 offset: 0 bytes
device size with M = 1024*1024: 2861588 MBytes
device size with M = 1000*1000: 3000592 MBytes (3000 GB)
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, with device specific minimum R/W multiple sector transfer: Max = 16 Current = 0
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
SET_MAX security extension
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
* General Purpose Logging feature set
* 64-bit World wide name
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Gen3 signaling speed (6.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* NCQ priority information
DMA Setup Auto-Activate optimization
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT LBA Segment Access (AC2)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
unknown 206[12] (vendor specific)
unknown 206[13] (vendor specific)
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
supported: enhanced erase
more than 508min for SECURITY ERASE UNIT. more than 508min for
ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50014ee25b5ed142

       NAA             : 5
       IEEE OUI        : 0014ee
       Unique ID       : 25b5ed142

Checksum: correct

May  3 18:18:50 relampago3 kernel: [ 3931.976021] usb 1-4: new
high-speed USB device number 4 using ehci_hcd
May  3 18:18:50 relampago3 kernel: [ 3932.108900] usb 1-4: New USB
device found, idVendor=152d, idProduct=2329
May  3 18:18:50 relampago3 kernel: [ 3932.108907] usb 1-4: New USB
device strings: Mfr=1, Product=2, SerialNumber=5
May  3 18:18:50 relampago3 kernel: [ 3932.108911] usb 1-4: Product:
USB to ATA/ATAPI Bridge
May  3 18:18:50 relampago3 kernel: [ 3932.108914] usb 1-4: Manufacturer: JMicron
May  3 18:18:50 relampago3 kernel: [ 3932.108917] usb 1-4:
SerialNumber: 152D20329000
May  3 18:18:50 relampago3 kernel: [ 3932.110324] usb-storage 1-4:1.0:
Quoted 1 line

Quirks match for vid 152d pid 2329: 8020

This is the first problem. I think only UAS has been tested over 2TB

Quoted 7 lines
May  3 18:18:50 relampago3 kernel: [ 3932.110360] scsi7 : usb-storage 1-4:1.0
May  3 18:18:50 relampago3 mtp-probe: checking bus 1, device 4:
"/sys/devices/pci0000:00/0000:00:1a.7/usb1/1-4"
May  3 18:18:50 relampago3 mtp-probe: bus: 1, device: 4 was not an MTP device
May  3 18:18:57 relampago3 hddtemp[1872]: /dev/sda: WDC WD2500JS-75NCB3: 34 C
May  3 18:19:06 relampago3 kernel: [ 3948.470324] scsi 7:0:0:0:

Direct-Access WDC WD30 EZRX-00MMMB0 PQ: 0 ANSI: 2 CCS

But this another minor issue: The device is reporting only as SCSI-2. That means it can't support READ CAPACITY(16) which is required to get devices > 2TB. We already expect this sort of thing from USB devices, so we should cope OK.

Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

James

Quoted 33 lines
May  3 18:19:06 relampago3 kernel: [ 3948.473541] sd 7:0:0:0: [sdf]
Write Protect is off
May  3 18:19:06 relampago3 kernel: [ 3948.473547] sd 7:0:0:0: [sdf]
Mode Sense: 34 00 00 00
May  3 18:19:06 relampago3 kernel: [ 3948.474287] sd 7:0:0:0: [sdf]
Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
May  3 18:19:06 relampago3 kernel: [ 3948.504915] Alternate GPT is
invalid, using primary GPT.
May  3 18:19:06 relampago3 kernel: [ 3948.504944]  sdf:
May  3 18:19:06 relampago3 kernel: [ 3948.507541] sd 7:0:0:0: [sdf]
Attached SCSI disk
May  3 18:19:06 relampago3 ata_id[3163]: HDIO_GET_IDENTITY failed for

'/dev/sdf': Invalid argument

fdisk: opción inválida -- c
GNU Fdisk 1.2.4
Copyright (C) 1998 - 2006 Free Software Foundation, Inc.
This program is free software, covered by the GNU General Public License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

Error: The backup GPT table is corrupt, but the primary appears OK, so that will be used.
o OK
c Cancel
o
Error: Can't have a partition outside the disk!

#12 lore raw
Quoted 7 lines · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

Regards
Oliver

maintainer
#13 lore raw
Quoted 11 lines · Oliver Neukum
Quoted 7 lines · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

Well, firstly we have to verify the theory, but if it pans out, probably ... this time a force RC16 flag. Unless there's any other way to tell that we have this problem?

James

#14 lore raw
In reply to Oliver Neukum
Quoted 11 lines · Oliver Neukum
Quoted 7 lines · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

The JMicron bridges are well known to be fairly buggy. Another quirk may indeed be the only solution. Oliver, would you like to write a patch for it?

Alan Stern

#15 lore raw
Quoted 11 lines · Alan Stern
Quoted 9 lines · Oliver Neukum
Quoted 7 lines · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

Quoted 7 lines
Quoted 2 lines

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

The JMicron bridges are well known to be fairly buggy. Another quirk may indeed be the only solution. Oliver, would you like to write a patch for it?

Would it make more sense to try READ CAPACITY(16) first? Or does that have other bad effects?

-hpa

maintainer
#16 lore raw
Quoted 15 lines · H. Peter Anvin
Quoted 14 lines · Alan Stern
Quoted 11 lines · Oliver Neukum
Quoted 7 lines · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
Quoted 2 lines
May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0: [sdf]

1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears to indicate the device isn't replying correctly to READ CAPACITY. The conventional return from READ CAPACITY should be -1 which would trigger us to retry with READ CAPACITY(16).

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

Quoted 7 lines
Quoted 4 lines

The JMicron bridges are well known to be fairly buggy. Another quirk may indeed be the only solution. Oliver, would you like to write a patch for it?

Would it make more sense to try READ CAPACITY(16) first? Or does that have other bad effects?

That has other effect: Many USB devices crash the firmware on 16 byte commands (sigh, welcome to our world ...)

James

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#18 lore raw

Don't worry... I have lived in that world for decades... it's a lot like BIOS.

Quoted 35 lines · James Bottomley
Quoted 5 lines · H. Peter Anvin
Quoted 4 lines · Alan Stern
Quoted 2 lines · Oliver Neukum
Quoted 1 line · On Tuesday 22 January 2013 11:05:35 James Bottomley wrote:
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May  3 18:19:06 relampago3 kernel: [ 3948.472796] sd 7:0:0:0:

[sdf]

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1565565872 512-byte logical blocks: (801 GB/746 GiB)

This looks like a wrap around of your actual size. This appears

to

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indicate the device isn't replying correctly to READ CAPACITY.

The

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conventional return from READ CAPACITY should be -1 which would

trigger

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us to retry with READ CAPACITY(16).

What can we do? The answer the device is giving is quite ordinary. Do we need another quirk and an associated flag?

The JMicron bridges are well known to be fairly buggy. Another

quirk

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may indeed be the only solution. Oliver, would you like to write a

patch for it?

Would it make more sense to try READ CAPACITY(16) first? Or does

that

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have other bad effects?

That has other effect: Many USB devices crash the firmware on 16 byte commands (sigh, welcome to our world ...)

James

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