[Info-vax] SCSI errors

[abrsvc]

On Oct 19, 3:17 pm, hel... at astro.multiCLOTHESvax.de (Phillip Helbig---
undress to reply) wrote:
> Consider the output after my questions below.
>
> This is the output from $ SHOW ERROR.  The 1 and 2 errors (except for
> that on DSA510:) show up regularly shortly after booting and don't
> increase.  The ones now at 32 and 33 increase slowly (few per day).  All
> disks are on DKB, not DKA.  Most or all of the DQ devices are not real.
>
> DSA510: has one member on each node.  DSA110: has both members on node
> JANDER.  Each node has two SCSI controllers, but only one (the external
> one) is in use.  All are "Qlogic ISP1020" except PKB0: on JANDER which
> is "SYM53C895 LVD SCSI" (operating in SE mode, though; all disks are
> single-ended).  I have the shortest cables I have (longer ones gave more
> errors) and I'm pretty sure I am within the allowed cable length.  
> Connected to each of the external controllers is a BA356 with 7 disks,
> essentially the same types on each node.
>
> Considering the fact that the error count increases only slowly (ca.
> 3--4 per day) a) what could be causing this and b) is it something to
> worry about?
>
> ---------8<----------------------------------------------------------------­---
>
> %SYSMAN-I-ENV, current command environment:
>         Clusterwide on local cluster
>         Username FOOBAR        will be used on nonlocal nodes
>
> %SYSMAN-I-OUTPUT, command execution on node MINNIM
> Device                           Error Count
> DSA510:                                  1
> PEA0:                                    1
> $170$DQA0: (MINNIM)                      1
> $170$DQA1: (MINNIM)                      1
> $170$DQB1: (MINNIM)                      1
> %SYSMAN-I-OUTPUT, command execution on node JANDER
> Device                           Error Count
> DSA110:                                 32
> PKB0:                                    2
> $110$DKB0: (JANDER)                      1
> $110$DKB200: (JANDER)                    1
> $110$DKB300: (JANDER)                    1
> $110$DKB500: (JANDER)                    2
> $110$DKB600: (JANDER)                    1
> PEA0:                                   33
> $110$DQA1: (JANDER)                      1
> $110$DQB0: (JANDER)                      1
> $110$DQB1: (JANDER)                      1
> %SYSMAN-I-OUTPUT, command execution on node LEEBIG
> Device                           Error Count
> $150$DQA0: (LEEBIG)                      1
> $150$DQA1: (LEEBIG)                      1
> $150$DQB1: (LEEBIG)                      1

What is the alpha model?

Also, what cables are you using?   BN38?

The controller inside of hte BA box is a BA35X-FA correct?

I would first determine whether or not the bus is terminated
correctly.  Unterminated buses are quite sensitive to cable lengths.

Dan