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SubjectRe: [BUG] Linux-2.6.31-rc1 Fails To Recognize Some USB Disks
On 06/29/2009 06:21 AM, Martin K. Petersen wrote:
> Can you please mail us the output of...
>
> # sg_inq /dev/sdb
> # sg_readcap /dev/sdb
> # sg_readcap -l /dev/sdb
>
> ... for that WD drive?
>
> You may have to install the sg3_utils package.
>
>

Here are the outputs of sg_* commands. But, I faced a strange behavior
when I was trying these sg_* commands. Initially, it didn't recognize my
usb WD disk as I mentioned in my BUG report. Then, after 8 mins, it
recognized (you can see it on attached "usb.log" file.) it! so, I was
able to get the outputs of sg_* commands ( Because; when it didn't
recognize it, there was no "sdb" file under /dev ) and now it works fine!

root@tarkane:~# sg_inq /dev/sdb
standard INQUIRY:
PQual=0 Device_type=0 RMB=0 version=0x00 [no conformance claimed]
[AERC=0] [TrmTsk=0] NormACA=0 HiSUP=0 Resp_data_format=0
SCCS=0 ACC=0 TGPS=0 3PC=0 Protect=0 BQue=0
EncServ=0 MultiP=0 [MChngr=0] [ACKREQQ=0] Addr16=0
[RelAdr=0] WBus16=0 Sync=0 Linked=0 [TranDis=0] CmdQue=0
[SPI: Clocking=0x0 QAS=0 IUS=0]
length=74 (0x4a) Peripheral device type: disk
Vendor identification: WD
Product identification: 2500JB External
Product revision level: 0108

root@tarkane:~# sg_readcap /dev/sdb
Read Capacity results:
Last logical block address=488397167 (0x1d1c596f), Number of
blocks=488397168
Logical block length=512 bytes
Hence:
Device size: 250059350016 bytes, 238475.2 MiB, 250.06 GB


root@tarkane:~# sg_readcap -l /dev/sdb
READ CAPACITY (16) failed [res=-1], try with '-v'


Tarkan

Jun 29 10:18:07 tarkane kernel: [160812.883025] usb 5-8: new high speed USB device using ehci_hcd and address 7
Jun 29 10:18:07 tarkane kernel: [160813.005316] usb 5-8: configuration #1 chosen from 1 choice
Jun 29 10:18:07 tarkane kernel: [160813.005704] scsi7 : SCSI emulation for USB Mass Storage devices
Jun 29 10:18:12 tarkane kernel: [160818.046665] scsi 7:0:0:0: Direct-Access WD 2500JB External 0108 PQ: 0 ANSI: 0
Jun 29 10:18:12 tarkane kernel: [160818.049086] sd 7:0:0:0: Attached scsi generic sg2 type 0
Jun 29 10:18:12 tarkane kernel: [160818.050136] sd 7:0:0:0: [sdb] 488397168 512-byte logical blocks: (250 GB/232 GiB)
Jun 29 10:18:43 tarkane kernel: [160848.805027] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:19:14 tarkane kernel: [160879.805023] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:19:45 tarkane kernel: [160910.805027] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:20:16 tarkane kernel: [160941.805024] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:20:47 tarkane kernel: [160972.809028] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:21:18 tarkane kernel: [161003.809029] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:21:49 tarkane kernel: [161034.809024] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:22:20 tarkane kernel: [161065.810022] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:22:20 tarkane kernel: [161065.932591] sd 7:0:0:0: [sdb] Write Protect is off
Jun 29 10:22:51 tarkane kernel: [161096.808032] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:23:22 tarkane kernel: [161127.809025] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:23:53 tarkane kernel: [161158.808037] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:24:24 tarkane kernel: [161189.809025] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:24:55 tarkane kernel: [161220.809056] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:25:26 tarkane kernel: [161251.809043] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:25:57 tarkane kernel: [161282.809033] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:26:28 tarkane kernel: [161313.809025] usb 5-8: reset high speed USB device using ehci_hcd and address 7
Jun 29 10:26:28 tarkane kernel: [161313.930904] sdb: sdb1
Jun 29 10:26:59 tarkane kernel: [161344.809026] usb 5-8: reset high speed USB device using ehci_hcd and address 7

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