On Wed, Aug 13, 2003 at 10:05:36AM +0200, Jochen Kunz wrote:
> On 2003.08.13 03:43 Sean Davis wrote:
> 
> > What I need is a pci (32 or 64 bit, it doesn't make too much
> > difference to me) Ultra2/lvd controller, as the drive I am using 
> > in that machine is an Ultra2/lvd, and I would like to be able to
> > run it at full speed. I need the controller to be bootable from SRM. 
> Well. If this drive (and perhaps a CDROM) is all you connect to the SCSI
> bus, you can get along with UltraWide (40 MB/s) or even FastWide (20
> MB/s). Only quite new drives are able to deliver sustained data
> transferes beyond 40 MB/s. A faster SCSI bus would only help if you
> connect several disks and use them simultaneously, e.g. in a RAID setup.
> So a good old Sym53C875 or QLA1040 UltraWide SCSI adapter should do the
> job. 
> -- 

All I have connected right now is:
sd0 at scsibus1 target 0 lun 0: <WDIGTL, WDE4550 ULTRA2, 1.22> disk fixed
sd0: 4340 MB, 6932 cyl, 6 head, 213 sec, 512 bytes/sect x 8890000 sectors
sd0: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers, tagged
queueing
cd0 at scsibus1 target 3 lun 0: <PLEXTOR, CD-ROM PX-40TW, 1.04> cdrom
removable
cd0: sync (100.00ns offset 12), 16-bit (20.000MB/s) transfers

Both on a QLA1020. FastWide doesn't seem to quite cut it. I used to use
Ultra wide with an equal-size hard drive on a pentium 166 (the machine in
question is an alpha 21164 266mhz) and it was quite a lot faster than this.

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