said:
>>However I do not use faster units at the moment,
>>my intention is / was to keep the option for any future changes ;-)
>
>When doing this planning, keep in mind what might change and what might
>not. U160 is now considered older technology. Most anything you purchase
>in that range will be surplus or used. Of course, if you have no time to
>shop, you can always find some place to purchase new at full price,
>but I assume you are not planning on doing this.
For workstation use, the Sustained Transfer Rates of even multiple HDs
are well within 160MB/sec. U160 is a now "sweet spot" in the market.
U160 HAs are more competent than the previous generation, Ultra2,
and are half the cost of U320 HAs which may not work on a workstation
PCI bus. U160 drives are a lot less expensive on the surplus/used
market, much more in keeping with my budget. If you find a good deal
someday on a U320 drive, it will run just fine on a U160 bus. If you're
making a server and have a deep pocketbook, then none if this applies.
>>From your mentioned types, I would keep along the Adaptec or the LSi types.
>>Another source has suggested the (hard to find) LSi 21003 ;-))
>>Since I am reconsidering I never discovered one ;-(
>
>The model is not all that important.
>What matters most is that the available connectors meet your needs....
The different connectors were listed, model-by-model in my previous post.
See which of them most closely meets your requirements, both today and
projected into the foreseeable future. I need both SE compatibility
for my older 50-pin SCSI devices and Ultra160 for my U160 10Krpm hard drive.
Your requirements will be different.
>>My mobo isn't quite old but how do I recognize
>>or differ a 32-bit PCI to a 64-bit one ??
>The 64-bit connector is longer than the 32-bit connectors you are used to.
Most workstation MBs today still have 32-bit PCI connectors.
High-end, dual processor MBs intended for server use will often have
64-bit PCI connectors. It is extremely unlikely that your MB
has a 64-bit PCI connectors unless you paid hundreds of dollars for it.
That said, it is almost a certainty that 64-bit PCI will work its way
down into workstation MBs as bandwidth requirements inevitably increase.
The 64-bit PCI connector is a logical extension of 32-bit PCI and
has an extension behind (away from the bracket-end of) the 32-bit connector.
The extension is less than half-as-long as the 32-bit PCI portion itself.
It is well shown in the documentation of the LSI Logic HAs, and others.
To fit a 64-bit PCI card on your 32-bit MB, you must have clearance
for the 64-bit card-edge section to project downward behind the
32-bit PCI connector once the card is installed. Not all MBs have
clearance in this area for every slot. And you'll need a bus-master
slot. Most modern MBs have plenty of bus-master slots, but some
older MBs have bus-master slots only at the AGP end.
--Steve
=====================================================
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
"rollin@scoug.com".
=====================================================
<< Previous Message <<
>> Next Message >>
Return to [ 31 |
August |
2003 ]
The Southern California OS/2 User Group
P.O. Box 26904
Santa Ana, CA 92799-6904, USA
Copyright 2001 the Southern California OS/2 User Group. ALL RIGHTS
RESERVED.
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.
