Timeline for Using Linux to read DDS-2 tape written under Solaris
Current License: CC BY-SA 4.0
9 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 14, 2021 at 0:00 | vote | accept | Dmitry Brant | ||
| Apr 14, 2021 at 0:00 | answer | added | Dmitry Brant | timeline score: 1 | |
| Apr 12, 2021 at 8:54 | comment | added | Kevin Nakamoto | It is almost impossible to read data beyond EOD, because this is controlled by drive firmware level. I found an interesting way to do this though it is very risky: pages.cs.wisc.edu/~plonka/sysadmin/backup.html | |
| Apr 11, 2021 at 22:25 | comment | added | Mark Plotnick | I don't know how to read past EOD. Are there any error messages in the system logs? Might try mt -f /dev/rst0 setblk 0 to ensure the drive is in variable block size mode, and try to read the tape again. | |
| Apr 11, 2021 at 20:40 | comment | added | Dmitry Brant | @MarkPlotnick Yep, the status at file 1 is EOD, which I suppose means that the drive believes that the data ends there. But this is very strange because there are four tapes that have the same behavior. I'm starting to suspect that the backup software that wrote these tapes somehow corrupted them (e.g. reinitialized the tape, causing the EOD marker to be written at the beginning)? I don't suppose there are ways to make the drive read past EOD? | |
| Apr 11, 2021 at 19:07 | comment | added | Mark Plotnick | Does mt -f /dev/nrst0 eod; mt -f /dev/nrst0 status show you're at file 1 or something else? | |
| Apr 10, 2021 at 12:24 | comment | added | Dmitry Brant | I wasn't specifying a block size, but even if I try various different block sizes the result is the same. If it was an issue of block sizes, wouldn't I be getting different types of errors than an end-of-tape condition? | |
| Apr 10, 2021 at 7:53 | comment | added | Kevin Nakamoto | What block size ("bs" argument) you used when "dd" command? As you might know, the actual value of bs depends on the software that was used to write the tape. | |
| Apr 10, 2021 at 3:55 | history | asked | Dmitry Brant | CC BY-SA 4.0 |