Problems with DLT tape drive.
Hi,
I hope that I have come to the right place. I have spent the whole weekend trying to fix a problem with a DLT Tape drive that I have bought second hand.
I keep on getting the following message when I try to back up to it.
tar: Removing leading `/' from member names
tar: /dev/st0: Cannot write: Input/output error
tar: Error is not recoverable: exiting now
This error occurs at a random time into the backup. It ssems not to matter if I have compression turned on or off on the tape drive and doesn't seem to matter if the data is easily compressible or not.
The kernel reports the following.
May 27 11:44:42 cpserver kernel: (scsi2:0:4:0) Data overrun detected in Data-Out phase, tag 0; May 27 11:44:42 cpserver kernel: Have seen Data Phase. Length=10240, NumSGs=1. May 27 11:44:42 cpserver kernel: Raw SCSI Command: 0x0a 00 00 28 00 00 May 27 11:44:42 cpserver kernel: st0: Error 27070000 (sugg. bt 0x20, driver bt 0x27, host bt 0x7).
I have the following scsi controlers on my system.
Intel Lancewood onboard #1
Adaptec AIC7xxx driver version: 5.1.33/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7896/7 Ultra2 SCSI host adapter
Ultra-2 LVD/SE Wide Controller Channel A at PCI 0/12/0
PCI MMAPed I/O Base: 0xf4120000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 19
SCBs: Active 0, Max Active 1,
Allocated 15, HW 32, Page 255
Interrupts: 155498
BIOS Control Word: 0x18a6
Adapter Control Word: 0x1c5e
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000 Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 0:
{255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 0:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi0:0:0:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 31 Transinfo settings: current(10/31/1/0), goal(10/127/1/0), user(10/127/1/0) Total transfers 155444 (90680 reads and 64764 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+ Reads: 15458 606 63034 7441 1711 943 1487 0 Writes: 24033 13752 19188 5631 1040 398 722 0
Intel Lancewood Onboard #2
Adaptec AIC7xxx driver version: 5.1.33/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7896/7 Ultra2 SCSI host adapter
Ultra-2 LVD/SE Wide Controller Channel B at PCI 0/12/1
PCI MMAPed I/O Base: 0xf4121000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 19
SCBs: Active 0, Max Active 1,
Allocated 15, HW 32, Page 255
Interrupts: 30
BIOS Control Word: 0x18a6
Adapter Control Word: 0x1c5e
Extended Translation: Enabled
Disconnect Enable Flags: 0xffff
Ultra Enable Flags: 0x0000 Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 1:
{255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 1:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
Adaptec 2930U
Adaptec AIC7xxx driver version: 5.1.33/3.2.4
Compile Options:
TCQ Enabled By Default : Disabled
AIC7XXX_PROC_STATS : Enabled
AIC7XXX_RESET_DELAY : 5
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7860 Ultra SCSI host adapter
Ultra Narrow Controller at PCI 0/13/0
PCI MMAPed I/O Base: 0xf4122000
Adapter SEEPROM Config: SEEPROM found and used.
Adaptec SCSI BIOS: Enabled
IRQ: 17
SCBs: Active 0, Max Active 1,
Allocated 15, HW 3, Page 255
Interrupts: 4505
BIOS Control Word: 0x10b6
Adapter Control Word: 0x0057
Extended Translation: Enabled
Disconnect Enable Flags: 0x00ff
Ultra Enable Flags: 0x0000 Tag Queue Enable Flags: 0x0000
Ordered Queue Tag Flags: 0x0000
Default Tag Queue Depth: 8
Tagged Queue By Device array for aic7xxx host instance 2:
{255,255,255,255,255,255,255,255,255,255,255,255,255,255,255,255}
Actual queue depth per device for aic7xxx host instance 2:
{1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1}
Statistics:
(scsi2:0:4:0)
Device using Narrow/Sync transfers at 5.0 MByte/sec, offset 15 Transinfo settings: current(50/15/0/0), goal(12/15/0/0), user(12/15/0/0) Total transfers 4293 (2 reads and 4291 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+ Reads: 0 0 0 2 0 0 0 0 Writes: 0 0 0 4291 0 0 0 0
(scsi2:0:5:0)
Device using Narrow/Async transfers.
Transinfo settings: current(0/0/0/0), goal(255/0/0/0), user(12/15/0/0) Total transfers 109 (90 reads and 19 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+ Reads: 90 0 0 0 0 0 0 0 Writes: 14 5 0 0 0 0 0 0
(scsi2:0:6:0)
Device using Narrow/Async transfers.
Transinfo settings: current(0/0/0/0), goal(255/0/0/0), user(12/15/0/0) Total transfers 0 (0 reads and 0 writes)
< 2K 2K+ 4K+ 8K+ 16K+ 32K+ 64K+ 128K+ Reads: 0 0 0 0 0 0 0 0 Writes: 0 0 0 0 0 0 0 0
The devices I have attached are as follows.
Attached devices:
Host: scsi0 Channel: 00 Id: 00 Lun: 00
Vendor: IBM Model: DNES-309170W Rev: SA30
Type: Direct-Access ANSI SCSI revision: 03
Host: scsi2 Channel: 00 Id: 04 Lun: 00
Vendor: DEC Model: DLT2000 Rev: 8528
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 05 Lun: 00
Vendor: IOMEGA Model: ZIP 100 Rev: J.02
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 06 Lun: 00
Vendor: AGFA Model: SnapScan Rev: 1.10
Type: Scanner ANSI SCSI revision: 02
I am running Debian GNU/Linux kernel 2.2.19 which I believe is the latest 2.2 stable kernel.
I have aic7xxx compiled into the running kernel, while st.o is inserted as a module.
I have tried the buffer_kbs=128 option, as suggested in various HOWTOs and have played with the other options for this module, but to no avail. I don't really know what these options do, even after reading /usr/src/linux/drivers/scsi/README.st.
I know I may be a little slow, but please bear with me.
As you can see I have a iomega zip and a Agfa snapscan connected to the same scsi bus. I have a micro 50 to centronics 50 pin cable from the host adaptor to the DLT drive. I have a 50 pin centronics to DB25 cable from the DLT drive to the zip drive and a db25-db25 cable from there to the scanner. The scanner is terminated with a db25 passive terminator.
After reading a SCSI FAQ, I have a feeling that mixing 25 pin devices with 50 pin devices may not be a good idea, but this is the only option I have at present without playing around a good deal to use the second host adaptor on the mainboard.
I have had no problems untill I installed the DLT drive. I have had confirmation the the DLT drive was working up until the time I purchased it. It was in operation in a large government department.
I am using a new tape. I cleaned the heads prior to using it.
Your feedback on this issue is very much appreciated.
Thank you to the community involved with producing the aic7xxx and the st drivers. Also to the folk who have written the mt software. I know many who use this software with great success.
Regards,
Andrew Reid C.P.Plating
Technical Sales Manager P O Box 1335 --------- /--- /---\
C. P. Plating Pty Ltd 222a Macathur Ave ------- / / /
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