SCOUG-HELP Mailing List Archives

<< Previous Message << >> Next Message >>

Date:	Tue, 4 Dec 2007 13:36:07 -0800
From:	scarter@vcnet.com
Reply-To:	scoug-help@scoug.com
To:	scoug-help@scoug.com
Subject:	SCOUG-Help: SCSI help needed

Content Type: text/plain

The 3MB/s transfer rate seems to imply Asynchronous, which, in my limited
experience, is much more reliable with less-than-perfect cabling (i.e.,
what I've got). I'm unsure if both can work on the same bus. It might be
HA dependent. I'm using NCR/Symbios/LSI Ultra160 HAs, not Adaptec. [Once worked
for NCR, and loyalty dies hard.]

+++++++++++++++++++++++++++++++++
Plextor 12/20 Plex PX-20TSi 20X Fast SCSI CD-ROM

Description:
12/20 PLEX12 to 20 Speed P-CAV CD-ROM Drive
The 12/20PleX [is] Plextor's high-performance 12 to 20 Speed SCSI P-CAV
CD-ROM drive, the first CAV (Constant Angular Velocity) drive.
Users are guaranteed a minimum of 12-Speed performance and will experience
up to 20-speed performance.

Up to five times as fast as a "standard" quad speed, the 12/20PleX's transfer
rate of 3MB/s speeds up most CD-ROM related computing tasks. The 12/20PleX also
boasts an average random access time of 95ms. ... Superior management of the
12/20PleX's 512KB buffer further enhances ....

excerpted from: "http://computers.pricegrabber.com/cdrom/plextor/p/6/"

++++++++++++++++++++++++++++++++
Quoting Jon Harrison :
> ...
> So it apparently is looking at the right place from the getgo and
> maybe my problem
> is the CDR is too slow to complete it's tasks in the time allowed
> by the HA (10 seconds). Yet when the Adaptec is installed and
> controlling the 3 HD's, the CDR is on the Symbios as the only
> device, it will boot, either of the 2 cd's I've tried.
>
> I have the drives set to sync 40, the cd set at 10 (I've tried all
> the settings on the CD). The CD is circa '97, a plextor PX-20TSi.
> It's also called a 12/20. I presume that means 12x speed and 20 as
> the sync, but maybe it means something else. The only thing I
> haven't tried is the HD's set to 10 so that all devices are equal.
> Don't want to lose the throughput.
> .... > rgds, Jon
> =====================================================

=====================================================

To unsubscribe from this list, send an email message
to "steward@scoug.com". In the body of the message,
put the command "unsubscribe scoug-help".

For problems, contact the list owner at
"postmaster@scoug.com".

=====================================================

Return to [ 04 | December | 2007 ]

SCOUG, Warp Expo West, and Warpfest are trademarks of the Southern California OS/2 User Group. OS/2, Workplace Shell, and IBM are registered trademarks of International Business Machines Corporation. All other trademarks remain the property of their respective owners.