Re: [BUG] Linux-2.6.31-rc1 Fails To Recognize Some USB Disks

[Tarkan Erimer <tarkan.erimer@turknet.net.tr>]

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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


[-- Attachment #2: usb.log --]
[-- Type: text/plain, Size: 3935 bytes --]

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