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Can you use an ultra160 SCSI drive with a ultra320 SCSI controller?
Wiki User
∙ 15y ago
Yes you can.
They will work fine. These statements "they are not designed to do this and would not do it well" WRONG and "Performance would be terrible and the drives would fail much sooner" also WRONG. U320 drives are backwards compatible and should work without issue on a U160 controller, the performance will be the same as a U160 drive and will not affect the drive's MTBF.
The drives will work fine !! The performance of the drives is NOT impacted at all --> they still rotate at the same speed; the seek times aren't any different; etc. The ONLY difference is that the interface speed is different (Ultra 160 vs Ultra 320). ... and it certainly has NO impact on the reliability of the drives !! [r.e. "... the drives would fail much sooner ..."].
... in fact, unless you're using an array which could support a sustained transfer rate higher than Ultra 160 speeds, the ONLY time there would be any difference in performance (compared to an Ultra 320 controller) will be in transfers to/from the drive's buffers => a very low % of disk operations.
Bottom line: Buy the disks you listed. They'll work just fine :-)
Credits: http://www.experts-exchange.com/Hardware/Servers/Q_23496890.html
Wiki User
∙ 15y ago
Wiki User
∙ 15y agoAccording to this web site,
http://www.scsita.org/aboutscsi/ultra320/faq.html
you can drive an Ultra 320 drive using an Ultra 160 SCSI controller. The Ultra 320 drive will not run at Ultra 320 speeds, but will revert to the slower 160 standard.
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SCSI bus can support up to how many devices simultaneously?
SCSI, Fast SCSI, Ultra SCSI, Ultra2 SCSI: 8 devices Wide SCSI, Fast Wide SCSI, Ultra Wide SCSI, Wide Ultra2 SCSI, Ultra3 SCSI, Ultra160 and 160+ and Ultra320 : 16 devices Of course, the number of devices supported depends not only on protocol limitations, but cable length, number of cables used, etc.
Can you use an ultra 320 SCSI drive with a ultra 160 SCSI controller?
an ugly person
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Why is there confusion between EIDE and SCSI drive interface standards
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What is the difference between ultra3 and ultra320?
http://www.sillworks.com/specs/u320_harddrives.php (This site will give you more detail. HP SCSI Ultra320 Hard Drive Option Kits (Servers) These Ultra320 Hard Drives are backwards compatible and can directly replace any Ultra2 or Ultra3 Proliant Universal 1" Hard Drive. The actual transfer rates of these Ultra320 Hard Drives however will be determined by the Smart Array Controller in your server (U2/U3/U320). A wide variety of rigorously tested, HP-qualified, SMART capable, Ultra320 Hard Drives offering data integrity and availability in hot pluggable and non-pluggable models. HP 15,000 rpm Hard Drives provide up to 26 percent better performance over standard 10,000 rpm drives. Actual performance increases will vary depending upon application and configuration. All HP hard drives pass a rigorous qualification process, which ensures that every HP drive is proven to perform in your ProLiant server or workstation. Before final certification, all HP hard drives are provided with HP-unique firmware specifically designed to optimize compatibility and functionality, including support of SMART and Insight Manager. HP received the 1999 Gold Idea Award for design excellence for the innovative design of the Hot Pluggable Universal drive carrier. The carrier is praised for both its ergonomics and aesthetics, as well as its many functional enhancements such as the compact design, improved cooling properties and more secure drive mounting for reduced vibration.
