[TriLUG] Slower Tape Backup After Upgrade

[Paul D. Boyle]

Hi All,

As I have mentioned previously on this list, I recently upgraded my SuSE
7.3 box to SuSE 9.1 (this is a SCSI box).  I have a backup script which
runs 3x a week and write the data to tape drive.  Before the upgrade
the back up would archive about 8GB in about 75-80 minutes.  After the
upgrade the same back up (actually, less data because I cleared out
about 2GB of "stuff") takes 9 *hours*.  Here are excerpts from 'dmesg'
which give the make and model of the scsi adapter and tape drive:

scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
        <Adaptec aic7890/91 Ultra2 SCSI adapter>
        aic7890/91: Ultra2 Wide Channel A, SCSI Id=7, 32/253 SCBs

(scsi0:A:6): 10.000MB/s transfers (10.000MHz, offset 15)
  Vendor: ARCHIVE   Model: Python 04106-XXX  Rev: 735B
  Type:   Sequential-Access                  ANSI SCSI revision: 02

Kernel is stock (latest updated) SuSE 9.1 (ver 2.6.5-7.108).

Also, FYI, I am using 'cpio -o -L -Hcrc' the heart of the backup script.

Anyone have any ideas as to why this is happening, or what can be done 
about it?

Thanks for any help.

Paul

-- 
Paul D. Boyle			    |	boyle at laue.chem.ncsu.edu
Director, X-ray Structural Facility |	phone: (919) 515-7362
Department of Chemistry - Box 8204  |	FAX:   (919) 515-8909
North Carolina State University     |	http://www.xray.ncsu.edu  
Raleigh, NC, 27695-8204