density code of sdlt220 and compression code 16

[Carmela Agustin]

Hi Scott,
How can I assign that this message has been solved by you? Can you pls reply again so I can assign 10pts and close this issue? Thanks very much again!

[Scott McIntosh_2 · Accepted solution]

Not a problem. You can usually look in /usr/include/sys/mtio.h to find the density codes stape knows. Small problem this time is that on IA-64, the entry for 220GB compressed (2:1), ie SDLT220 format with compression on, is actually mistyped. It says 100GB uncompressed and 200GB compressed, and that's wrong. So a bad example in this case. But, you see the value for 220GB compressed is 0x91 hex, which is 145 decimal. Thus your -b value for mksf.

As for the -c value, you really have to look at the "SCSI Reference Manual" for the drive, which you should be able to obtain from the drive vendor. For SDLT220/SDLT320, the only allowed value is 0x10, or decimal 16.

Thanks,
Scott
HP Support

[Carmela Agustin]

Scott McIntosh was able to solve my inquiry about the density code of sdlt220 and now I can do backup from the said drive. Thank you.