Hi, On 9/25/2006 8:31 PM, Hristo Benev wrote: > Hi, > > I have Python 04106-XXX Rev: 7550 DDS-3 tape drive. > > Is there a way to check if HW compression is ON or OFF, and what is > better to use HW or SW one currently I use GZIP=1 SW one
Well, Hardware compression is done in the tape hardware. You transfer the uncompressed data through your network and backup server and SCSI subsystem, but don't need extra CPU power on the client. Personally, I prefer hardware compression, but there are claims that you might lose the whole tape contents when you encounter incompatible devices. Which is something I consider a myth, given that hardware-compressing tape drives are always compatible (as far as I know). Trying to compress pre-compressed or encrypted data is counterproductive, so, if you need fine-grained control over compression you better use software compression. > tapeinfo gives me an error > > tapeinfo -f /dev/tape Try tapeinfo -f /dev/sgX tapeinfo needs to be pointed to the generig SCSI device representing your tape drive. Arno > mtx: Request Sense: Long Report=yes > mtx: Request Sense: Valid Residual=no > mtx: Request Sense: Error Code=0 (Unknown?!) > mtx: Request Sense: Sense Key=Hardware Error > mtx: Request Sense: FileMark=no > mtx: Request Sense: EOM=no > mtx: Request Sense: ILI=no > mtx: Request Sense: Additional Sense Code = C1 > mtx: Request Sense: Additional Sense Qualifier = 85 > mtx: Request Sense: BPV=yes > mtx: Request Sense: Error in CDB=no > mtx: Request Sense: SKSV=no > mtx: Request Sense: Field Pointer = 00 00 > INQUIRY Command Failed > > and mt status gives: > mt status > SCSI 2 tape drive: > File number=0, block number=0, partition=0. > Tape block size 512 bytes. Density code 0x25 (DDS-3). > Soft error count since last status=0 > General status bits on (41010000): > BOT ONLINE IM_REP_EN > > > > Thank you, > -- IT-Service Lehmann [EMAIL PROTECTED] Arno Lehmann http://www.its-lehmann.de ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Bacula-users mailing list Bacula-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bacula-users
