Hi,
Thanks for responding to my mail:
Jeff Woolsey <woolsey@jlw.com>
Kevin Warren <Kevin.Warren@aom.bt.co.uk>
Dwight Peters <dpeters@nswc.navy.mil>
Joel Lee <jlee@thomas.com>
Bismark Espinoza <bismark@alta.jpl.nasa.gov>
CHENTHIL KG <chenthil@mtcts1.mt.lucent.com>
Stefan Voss <s.voss@terradata.de>
Rob Windsor <windsor@warthog.com>
"Scott F. Woods" <sfw@adc.idt.com>
Matt Reynolds <reynolmd@aston.ac.uk>
Most of the people asked me to clean the tape.
I did but :-(
Tried other suggestions also, but :-((. So if
after reading this summary anybody has other
suggestions, then they are welcome. Will
summarize again.
The other suggestions were:
--------------------------------------------------------------
First thing I'd try would be to insert a cleaning cartridge into the
tape drive, even if the lights aren't flashing. (These lights only
flash after 30 hours use anyway. They don't register data errors)
Second thing I'd try would be to insert the cartridge written by the
8200 into the 8500 write protected. There's something in the manual
about getting an 8500 drive to read cartridges written by an 8200 that
says this can only be done if it is inserted write protected. Mind you,
when this problem happened for me the 8500 the drive simply kept
ejecting the tape until I'd write protected it. Also, I think I may
have drive models mixed up. My setup could have been reading 8500
written cartridges in an 8700 drive. Maybe it's the same though.
Hope this helps,
Kevin.
-- this will only be a tiny bit of help if any at all. I would bet that the old tape drive heads (of course, it could be the new machine but its less likely) were out of calibration (alignment) and the tape is borderline readable by the new tape drive. Probably time to get some data extraction company to recover the data from the tape. But I am not really an expert in this area.Dwight Petersen -- You should get the 8200 to read the tape. Although the 8500 should read it, there maybe some disparity in how your 8200 wrote to the tape.
Joel -- Probable suggestions & directions..Check the st.conf file..Also try using a 160m tape & see if that helps..
thanks. *Chenthil Kumar -- I don't know if 8500's can read 8200 format tapes, but if they can I'll bet you have to use the l device. For example, /dev/rmt/0l
Try doing a `man st` to get a summary of what the different devices are for an 8mm tape drive.
Scott Woods --- The tape was probably damaged by the faulty 8200m. You should however, be able to extract the majority of the files from the tape archive. It'll take a long time - get a listing of the files on the tape, then try extracting them one at a time via a shell script. That way it should only fail for the files which have been corrupted. Everything else should come off the tape okay. (And re-try it a couple of times aswell for the bad files - it's not an exact science...)
BTW, I've never done this, but I think it'll work. (The usual disclaimer ;-))
Matt.
--
The Original Question:
Hello sun-managers,
Tape drive : Exabyte EXB-8200m Tapes: Sony QG 112M 5.0 GB Accessed this TD as /dev/rst4. Been taking backups on this TD all the while. Now this TD has gone bad. Got another TD - Exabyte EXB-8500m
I am trying to extract data from my tapes on the EXB-8500m. SCSI id is set to 5. Tapes are not read when I access this as /dev/rst5. They are accessible as /dev/rmt/1m. But the extraction breaks halfway thru with the following error messages: ---------------------------------------------------------------- WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Soft error rate (100%) during reading was too high Please, replace tape cartridge WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Soft error rate (110%) during reading was too high Please, replace tape cartridge WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Error for command 'read' Error Level: Fatal Requested Block 3, Error Block: 3 Sense Key: Media Error Vendor 'EXABYTE': ASC = 0x11 (unrecovered read error), ASCQ = 0x1, FRU = 0x0 WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Soft error rate (46%) during reading was too high Please, replace tape cartridge WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Error for command 'read' Error Level: Fatal Requested Block 3, Error Block: 3 Sense Key: Media Error Vendor 'EXABYTE': ASC = 0x11 (unrecovered read error), ASCQ = 0x1, FRU = 0x0 WARNING: /sbus@1f,0/espdma@e,8400000/esp@e,8800000/st@5,0 (st5): Soft error rate (26%) during reading was too high Please, replace tape cartridge ----------------------------------------------------------------
Is there any way in which I can retrieve files from the tapes. Please help. Will summarize.
Regards,
Pravin prchavan@pcsbom.patni.com
This archive was generated by hypermail 2.1.2 : Fri Sep 28 2001 - 23:12:34 CDT