Date: Fri, 21 Jul 2000 10:15:15 -0500 From: "Alejandro Ramirez" <ales@megared.net.mx> To: <freebsd-questions@freebsd.org> Cc: <freebsd-scsi@freebsd.org> Subject: SCSI Bus Reset & Frozen System with ahc driver !!! Message-ID: <028401bff326$78f210e0$02c134c8@megared.net.mx>
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Hi all, I have a Netfinity 3500 server with FreeBSD 3.4-RELEASE and an Adaptec aic7895 Ultra SCSI adapter card, that has an IBM tape drive: sa0 at ahc0 bus 0 target 6 lun 0 sa0: <ARCHIVE Python 04106-XXX 743B> Removable Sequential Access SCSI-2 device sa0: 10.000MB/s transfers (10.000MHz, offset 15) da0 at ahc0 bus 0 target 0 lun 0 da0: <IBM-PSG DNES-309170W !# SA30> Fixed Direct Access SCSI-3 device da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) da1 at ahc0 bus 0 target 1 lun 0 da1: <IBM-PSG DNES-309170W !# SAB0> Fixed Direct Access SCSI-3 device da1: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled da1: 8678MB (17774160 512 byte sectors: 255H 63S/T 1106C) I have configured nightly backups in this server, suddenly the tape started to fail, and I were told by IBM to upgrade the firmware of this tape, I did it and its still failing, but the problem now its worst, because the system gets frozen when the backup starts, and the only way of get it out from this state its rebooting the server, this is the message that it gives after getting frozen: (sa0:ahc0:0:6:0): SCB 0x6b - timed out in command phase, SEQADDR == 0x152 (sa0:ahc0:0:6:0): BDR message in message buffer (sa0:ahc0:0:6:0): SCB 0x6b - timed out in command phase, SEQADDR == 0x152 (sa0:ahc0:0:6:0): no longer in timeout, status = 34b ahc0: Issued Channel A Bus Reset. 5 SCBs aborted I know that I have to change the tape drive, and I also have eliminating the cron job from being executed, but in the mean time I really dont think that ist good to freebsd not to be able to recover it self from this state, resetting the SCSI bus where the disks also lives, and got frozen by this??? could this be a bug in the ahc driver??? Thanks for your help... Ales To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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