[Info-vax] Disk offline message when trying to mount

[Rich Jordan]

On Feb 9, 11:33 am, Rich Jordan <jor... at ccs4vms.com> wrote:
> On Feb 9, 9:27 am, tadamsmar <tadams... at yahoo.com> wrote:
>
> > On Feb 9, 10:25 am, tadamsmar <tadams... at yahoo.com> wrote:
>
> > > I have a DS10 running VMS 7.3-2
>
> > > I was trying out a used disk I bought.
>
> > > It's recognized as DKA100 after boot, but I get a disk offline message
> > > when I do MOUNT/FOR DKA100
>
> > > Any ideas?  I tried adding a jumper to enable auto spin, did not work
>
> > > There are jumper locations for "force se","ti sync nego","disable unit
> > > attn", all are open now.
>
> > It's an IBM Ultrastar disk  ultra3 scsi drive model DDYS-T09170
>
> Which SCSI controller are you using?
>
> My info shows that drive as having an SCA connector.  If you are using
> an SCA to 68 pin adapter to connect to the cable in your box, are you
> certain the adapter is ok?  Does it have jumpers on it, and if so what
> do they control besides device ID and apparently spinup?  Is there a
> SYNCH/ASYNCH jumper and how is it set?  Is there an LVD/SE jumper?  Is
> it rated for the speed of your adapter (the drive is apparently a
> U160)?
>
> My DS10L has a KZPEA adapter (U160).  I have several IBM drives that
> have worked in it using a generic U160 rated SCA to 68 pin adapter;
> its currently running an internal IBM Eserver 24P3763 18.2GB 10KRPM
> U160 SCA disk very reliably.
>
> However I tried both 36GB and 73GB 2.5" Seagate U320 drives that were
> discussed here late last year and none of them would come online when
> connected via the 68-SCA adapter.  They worked just fine when I
> plugged them into my SuperMicro removable disk cage which was plugged
> into the second external port of the KZPEA; all recognized, mountable,
> usable.
>
> My suspicions rest on the 68 pin to SCA adapters, but if you have an
> alternate means of plugging that drive into your SCSI bus to test, it
> might be worth a try.

Sorry missed that you listed the jumpers. If you are using a KZPBA
controller you might try setting the 'Force SE' jumper.  If a KZPCA or
KZPEA then that should not be needed.  I'm not sure about the others.