Recommended tape block size ??

[Trevor McLachlan]

I was just wondering what the recommended tape block size is for the HP Surestore 80 DLT drive ? I am thinking it is 64kb ... Does anyone know for sure ?

[Pete Randall]

I did a search on "tape" +"block size" and came up with the following threads (among others):
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x2da0ee3e323bd5118fef0090279cd0f9,00.html
http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x6c7e107d277ad611abdb0090277a778c,00.html

Hopefully, these may be of some help.

Pete

[Stefan Farrelly]

For an optimum size on our DLT 8000's we use a blocksize of 128k. Weve found this the best for performance and backup times.

[George Abraham_1]

hai

I had done some reaearch on this.. I think 64k is good when you do OS backups and 128 when you do some database backups..

keep smiling
george

[Frank Slootweg]

Which program(s) use the drive?

If fbackup, then at least 64KB (blockperrecord 64).

If OmniBack, use the default for the device class.

If tar(1), use the default (10KB), or better, use pax(1) with 32KB ("-b 32768", ignore the manpage).

If cpio(1), use pax(1) instead, see above.