Config:-
8 x AlphaServers (GS140/ES40 running 4.0F, HBA = KGPSA (some with driver rev
1.10, one with 1.12)
2 x Brocade silkworm 2800 Fibre-Channel switch (BFOS 2.1.4)
Adic Scalar 1000 tape library with 8 x DLT7000
3 x Adic FCR200 Fibre-Channel to SCSI routers (crossroads CP4200s with F/W
rev 2.2 9912e)
Hi,
We are currently having problems consistently seeing DLT7000 drives on a
SAN. The drives
are connected to the SAN using Crossroads CP4200 Fibre-SCSI routers.
We have been using the 'file' command to see the identification string and
from
a single system I would expect to see info regarding all 8 drives
consistently, but
this is not so. It seems that some drives don't report information and an
'mt status'
command to the drive reports 'device busy'.
Also, there are error log entries for RESERVATION_CONFLICT reported for some
of the drives.
So far, we suspect that this is a SCSI reserve/release problem and if it is,
is there a way to turn
it off in the operating system. Does anyone have a clear understanding of
how this works ?
eg. What happens if a device is reserved by another host ? Will an i/o to
the device wait or
time-out or can you specify this ?
TIA
Richard Wood
Received on Fri Mar 10 2000 - 16:34:22 NZDT