USB and iPod detection problem

===== Original Message From Matthew Dharm <[email protected]>

Additional sense indicates Logical unit is in process of becoming ready

I recently aquired a 30GB iPod and tried to connect it to my portable Dell X200 running Mandrake 9.1. It works, but it seems there is a problem with

iPod HD not spinning up fast enough for proper detection to take place. The following is from the output of 'dmesg' when I plug in my iPod:

usb-uhci.c: interrupt, status 2, frame# 1601
usb.c: USB device not accepting new address=3 (error=-110) hub.c: new USB device 00:1d.0-1, assigned address 4
usb.c: USB device not accepting new address=4 (error=-110) hub.c: new USB device 00:1d.0-1, assigned address 5
scsi0 : SCSI emulation for USB Mass Storage devices
Vendor: Apple Model: iPod Rev: 1.40
Type: Direct-Access ANSI SCSI revision: 02
WARNING: USB Mass Storage data integrity not assured
USB Mass Storage device found at 5
Attached scsi removable disk sda at scsi0, channel 0, id 0, lun 0 usb-uhci.c: interrupt, status 3, frame# 52
sda : READ CAPACITY failed.
sda : status = 1, message = 00, host = 0, driver = 08 Current sd00:00: sense key Not Ready
Additional sense indicates Logical unit is in process of becoming ready sda : block size assumed to be 512 bytes, disk size 1GB.
/dev/scsi/host0/bus0/target0/lun0: I/O error: dev 08:00, sector 0 I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 2097144
I/O error: dev 08:00, sector 2097144
I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
ldm_validate_partition_table(): Disk read failed.
I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 2
unable to read partition table
VFS: Disk change detected on device 08:00
sda : READ CAPACITY failed.
sda : status = 1, message = 00, host = 0, driver = 08 Current sd00:00: sense key Not Ready
Additional sense indicates Logical unit is in process of becoming ready sda : block size assumed to be 512 bytes, disk size 1GB.
sda: test WP failed, assume Write Enabled
/dev/scsi/host0/bus0/target0/lun0: I/O error: dev 08:00, sector 0 I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 2097144
I/O error: dev 08:00, sector 2097144
I/O error: dev 08:00, sector 0
I/O error: dev 08:00, sector 0
ldm_validate_partition_table(): Disk read failed.
I/O error: dev 08:00, sector 0
VFS: Disk change detected on device 08:00
SCSI device sda: 58595040 512-byte hdwr sectors (30001 MB)
sda: Write Protect is off
/dev/scsi/host0/bus0/target0/lun0: p1 p2

Especially the "sda : block size assumed to be 512 bytes, disk size 1GB." is

problem as the kernel only thinks the HD is 1GB while the partition table of course says 30GB. I can solve it by disconnecting and quickly reconnecting

iPod as the HD will then already be spun up and it is detected correctly as seen above.

Perhaps the USB drivers can be made to wait a bit in case the device does

seem ready, or perhaps an exception with extra waiting time in the case of

iPod?

Thanks.

--
Kristian

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