I'm not saying it's a hardware problem, but we completely abandoned DLT usage last year because of incessant problems. We switched to LaCie 2TB "BigDisk" drives. We're having problems with those too, usually involving replugging the USB connector. That's Windows for you.
On 10/12/07, -ray <ray at ops.selu.edu> wrote: > > Ronnie, > > A few things come to mind. First check the block size. I remember having > a problem (probably on AIX though) of a tape drive taking WAY too long, > turned out to be a block size mismatch. You may be able to check with mt > -f /dev/st0 status. I don't know what it should be though haha...maybe > check the tape drive docs and experiment. > > I'm guessing this drive is ancient... any firmware updates for it? > Probably not doing encryption either. I know RHEL3 is 2.4 kernel based, > but i'd try with a 2.6 kernel (boot ubuntu or something) and see if the > problem persists. There are probably significant changes b/t 2.4 and 2.6. > > I'm sure you tried the usual tape suspects already. Run a new cleaning > cartridge through the drive, try a new tape, change scsi id, try a > different cable, different terminator, different scsi card. try all the > above on a different machine. The only thing more fun than > troubleshooting SCSI problems, is troubleshooting SCSI tape problems haha. > > ray > > > > On Fri, 12 Oct 2007, Ronnie Gilkey wrote: > > > Hey all, > > > > I'm having some issues with a Benchmark DLT1 tape drive. What's > > happening is that a daily backup of about 20 GB is taking about 9 hours > > to run. This is way too long for that little bit of data. I've checked > > system usage throughout that period with sar reports and the system > > maintains a level of about 96% idle, so the system isn't busy. For most > > tape modern tape drives 20 GB should take about an hour to backup. I've > > also checked dmesg for errors, there aren't a lot just these: > > > > st0: Block limits 2 - 16777214 bytes. > > st0: Error with sense data: Info fld=0x2800, Current st09:00: sense key > > Not Ready > > Additional sense indicates Logical unit not ready,initializing cmd. required > > st0: Error with sense data: Current st09:00: sense key Not Ready > > Additional sense indicates Logical unit not ready,initializing cmd. required > > st0: Error 250400f4 (sugg. bt 0x20, driver bt 0x5, host bt 0x4). > > st0: Error 250400f4 (sugg. bt 0x20, driver bt 0x5, host bt 0x4). > > st0: Error on write filemark. > > st0: Error 250400f4 (sugg. bt 0x20, driver bt 0x5, host bt 0x4). > > > > Has anyone else had any problems with this type of tape drive? Any > > suggestions? I've posted the scsi_info & sdparm output below. > > > > Thanks, > > > > Ronnie > > > > [root at myhost root]# scsi_info /dev/st0 > > SCSI_ID="5,0,0" > > MODEL="BNCHMARK DLT1" > > FW_REV="5538" > > [root at myhost src]# sdparm --all /dev/st0 > > /dev/st0: BNCHMARK DLT1 5538 [tape] > > Read write error recovery mode page: > > AWRE 0 [cha: n, def: 0] > > ARRE 0 [cha: n, def: 0] > > TB 0 [cha: n, def: 0] > > RC 0 [cha: n, def: 0] > > EER 1 [cha: n, def: 1] > > PER 0 [cha: y, def: 0] > > DTE 0 [cha: n, def: 0] > > DCR 0 [cha: n, def: 0] > > RRC 32 [cha: n, def: 32] > > COR_S 0 [cha: n, def: 0] > > HOC 0 [cha: n, def: 0] > > DSOC 0 [cha: n, def: 0] > > WRC 15 [cha: n, def: 15] > > Control mode page: > > TST 0 [cha: n, def: 0] > > TMF_ONLY 0 [cha: n, def: 0] > > D_SENSE 0 [cha: n, def: 0] > > GLTSD 0 [cha: n, def: 0] > > RLEC 0 [cha: y, def: 0] > > QAM 0 [cha: n, def: 0] > > QERR 0 [cha: n, def: 0] > > RAC 0 [cha: n, def: 0] > > UA_INTLCK 0 [cha: n, def: 0] > > SWP 0 [cha: n, def: 0] > > ATO 0 [cha: n, def: 0] > > TAS 0 [cha: n, def: 0] > > AUTOLOAD 0 [cha: n, def: 0] > > Data compression (SSC) mode page: > > DCE 1 [cha: y, def: 1] > > DCC 1 [cha: n, def: 1] > > DDE 1 [cha: n, def: 1] > > RED 0 [cha: n, def: 0] > > COMPR_A 16 [cha: n, def: 16] > > DCOMPR_A 16 [cha: y, def: 16] > > Device configuration (SSC) mode page: > > CAF 0 [cha: n, def: 0] > > ACT_F 0 [cha: n, def: 0] > > ACT_P 0 [cha: n, def: 0] > > WOBFR 0 [cha: n, def: 0] > > ROBER 0 [cha: n, def: 0] > > WDT 200 [cha: y, def:200] > > OBR 0 [cha: n, def: 0] > > LOIS 1 [cha: n, def: 1] > > RSMK 0 [cha: n, def: 0] > > AVC 0 [cha: n, def: 0] > > SOCF 0 [cha: n, def: 0] > > ROBO 0 [cha: n, def: 0] > > REW 0 [cha: n, def: 0] > > GAP_S 0 [cha: n, def: 0] > > EOD_D 0 [cha: n, def: 0] > > EEG 1 [cha: n, def: 1] > > SEW 1 [cha: y, def: 1] > > SWP_T 0 [cha: n, def: 0] > > BAML 0 [cha: n, def: 0] > > BAM 0 [cha: n, def: 0] > > OBSAEW 0 [cha: n, def: 0] > > SDCA 1 [cha: y, def: 1] > > WTRE 0 [cha: n, def: 0] > > OIR 0 [cha: n, def: 0] > > ROR 0 [cha: n, def: 0] > > ASOCWP 0 [cha: n, def: 0] > > PERSWP 0 [cha: n, def: 0] > > PRMWP 0 [cha: n, def: 0] > > Medium partition (SSC) mode page: > > MAX_AP 0 [cha: n, def: 0] > > APD 0 [cha: n, def: 0] > > FDP 0 [cha: n, def: 0] > > SDP 0 [cha: n, def: 0] > > IDP 0 [cha: n, def: 0] > > PSUM 0 [cha: n, def: 0] > > POFM 0 [cha: n, def: 0] > > CLEAR 0 [cha: n, def: 0] > > ADDP 0 [cha: n, def: 0] > > MFR 1 [cha: n, def: 1] > > PART_U 0 [cha: n, def: 0] > > Informational exceptions control mode page: > > PERF 0 [cha: n, def: 0] > > EBF 0 [cha: n, def: 0] > > EWASC 0 [cha: n, def: 0] > > DEXCPT 1 [cha: n, def: 1] > > TEST 0 [cha: n, def: 0] > > EBACKERR 0 [cha: n, def: 0] > > LOGERR 0 [cha: n, def: 0] > > MRIE 3 [cha: n, def: 3] > > INTT 0 [cha: n, def: 0] > > REPC 0 [cha: n, def: 0] > > > > > > -- > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > Ray DeJean http://www.r-a-y.org > Systems Engineer Southeastern Louisiana University > IBM Certified Specialist AIX Administration, AIX Support > =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-= > > > _______________________________________________ > General mailing list > General at brlug.net > http://mail.brlug.net/mailman/listinfo/general_brlug.net >
