Porouchany disk

Zdenek Pytela letty na mrakoplas.phil.muni.cz
Úterý Červen 10 12:04:00 CEST 1997


	Dobry den.
	Pravdepodobne mi odesel disk v asi rok starem pocitaci.
Je to SCSI disk Seagate Barracuda, 4 GB, na disku je jedna ext2 oblast.
K problemum doslo z niceho nic, bez predchoziho varovani.
V messages se zacaly objevovat hlasky
Jun  5 20:31:31 mrakoplas kernel: attempt to access beyond end of device
Jun  5 20:31:31 mrakoplas kernel: 08:51: rw=0, want=68965188, limit=4193264

Jun  6 01:03:24 mrakoplas kernel: attempt to access beyond end of device
Jun  6 01:03:24 mrakoplas kernel: 08:51: rw=0, want=16744033, limit=4193264
Jun  6 01:03:24 mrakoplas kernel: Kernel panic: EXT2-fs panic (device 08:51):
 ext2_read_inode: unable to read i-node block - inode=481281, block=16744032
Jun  6 01:03:24 mrakoplas kernel:

Procesy pristupujici k tomuto disku se odmitaly ukoncovat a zustavaly ve 
stavu zombie, postupne rostlo zatizeni (load).
Ted se pri e2fsck /dev/sdf1 objevi sada hlasek pro cisla 227 az 253:

Block bitmap for group 253 is not in group.  (block 624656)
Relocate<y>? yes

Inode bitmap group 253 not in group.  (block 1656119)
Relocate<y>? yes

Inode table for group 253 not in group.  (block 6)
WARNING: SEVERE DATA LOSS POSSIBLE.
Relocate<y>? yes

/dev/sdf1 contains a file system with errors, check forced.
Pass 1: Checking inodes, blocks, and sizes
fsck.ext2: A block group is missing an inode table. while doing inode scan

Touto hlaskou kontrola konci, dalsi faze neprobihaji ani pri opakovanem
spusteni. Nepomaha -b 8193 ani s vyssimi hodnotami ani dalsi volby, co jsem 
zkousel. Test disku, ktery ma Adaptec (jmenuje se Verify nebo podobne),
nerekl vubec nic.
Je nejaka moznost disk opet zprovoznit nebo z nej zachranit data, 
nejlepe oboji?

-- 

--Zdenek Pytela, <letty na phil.muni.cz>



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