SCSI disk - Medium Error

David Olszyński hisaak na mrkvoslav.ascs.muni.cz
Pondělí Listopad 12 15:09:15 CET 2001


Dobry den.

Pri pokusu o pripojeni nekterych jednotek (/dev/sdb1, /dev/sda6) dostanu 
Segmentation fault a v logu se mi objevi toto:
reiserfs: checking transaction log (device 08:06) ...
scsi0: ERROR on channel 0, id 0, lun 0, CDB: Read (10) 00 00 29 33 1c 00 00 
08 00
Info fld=0x29331e, Current sd08:06: sense key Medium Error
Additional sense indicates Unrecovered read error
I/O error: dev 08:06, sector 49272
Unable to handle kernel NULL pointer dereference at virtual address 00000034
printing eip:
c016d48f
*pde = 00000000
Oops: 0000
CPU:    0 
EIP:    0010:[<c016d48f>]
EFLAGS: 00010292
eax: 00000000   ebx: 00000000   ecx: df37ddf8   edx: de711140
esi: df37ddfc   edi: c18e6800   ebp: c18e6800   esp: df37dd8c
ds: 0018   es: 0018   ss: 0018
Process mount (pid: 105, stackpage=df37d000)
Stack: 00000000 df37c000 de71118c de71118c de73af60 00000000 df37ddfc 
c18e6800 
       0000180f c016dea2 c18e6800 00000000 df37ddf8 df37ddfc 00000806 
0000180f  
       00001000 df37ddfc df37ddf8 00000001 00000001 deeec000 00000013 
0000169a
Call Trace: [<c016dea2>] [<c016c0a3>] [<c016e696>] [<c0161796>] [<c01331cd>]
[<c0133410>] [<c0138020>] [<c0133cd7>] [<c010f9c0>] [<c0106ddc>] 
[<c0133f96>]
[<c0133e4c>] [<c013402c>] [<c0106ceb>] 

Code: 8b 40 34 89 04 24 8b 58 04 85 db 0f 84 80 01 00 00 fc 89 c6 

Relevantni vypis z dmesg nasleduje:

(scsi0) <Adaptec AHA-294X Ultra SCSI host adapter> found at PCI 0/10/0
(scsi0) Wide Channel, SCSI ID=7, 16/255 SCBs
(scsi0) Cables present (Int-50 NO, Int-68 YES, Ext-68 NO)
(scsi0) Downloading sequencer code... 436 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.2.4/5.2.0
       <Adaptec AHA-294X Ultra SCSI host adapter>
  Vendor: IBM       Model: DNES-318350W      Rev: SA30
  Type:   Direct-Access                      ANSI SCSI revision: 03
  Vendor: SEAGATE   Model: ST318436LW        Rev: 0010
  Type:   Direct-Access                      ANSI SCSI revision: 03
Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0
(scsi0:0:0:0) Synchronous at 40.0 Mbyte/sec, offset 8.
SCSI device sda: 35843670 512-byte hdwr sectors (18352 MB)
Partition check:
 sda: sda1 sda4 < sda5 sda6 sda7 >
(scsi0:0:1:0) Synchronous at 40.0 Mbyte/sec, offset 8.
SCSI device sdb: 35885168 512-byte hdwr sectors (18373 MB)
 sdb: sdb1 sdb2


Zajimave je, ze partisny se swapy, ktere jsou na koncich obou disku se 
pripoji bez problemu. Stejnetak i ostatni partisny s daty. Nemusim ani 
zduraznovat, ze to nejdulezitejsi lezi zrovna na tech, ktere pripojit 
nejde. :-(

Problemy nastaly po vypadku proudu. Do te doby vse fungovalo. V pripade, ze 
jde o problem v tech discich, muze byt toto pricinou?

Zkousel jsem i readonly reiserfsck, ktery se tvaril, ze je vse vporadku. 
Myslite, ze by sla ta data z tech disku jeste nejak dostat?

David Olszynski



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