Re: more on AHA-2940UW vs. MSDOS file system
Harold A Czegledi (hac@thinkage.on.ca)
Thu, 19 Sep 1996 10:05:25 -0400 (EDT)
I've observed this behaviour as well on the 2GB wide Quantum
Atlas. A test I performed, with tagged queuing enabled and with the maximum
number of tagged SCSI commands set to one, resulted in a QUEUE_FULL status
every 38 I/O's when doing a one block I/O operation. Setting the FUA bit
within the 10-byte SCSI SCB "fixed" the problem but at a substantial cost
to overall I/O throughput. As a result, I think a switch to a Seagate
Barracuda may be in order - hopefully, it does not exhibit the same sort
of behaviour.
Harold