RE: IO rate for U320 SCSI 15K RPM Hard Drive
- From: "Michael Erwin" <michael.erwin@xxxxxxxxxx>
- To: <cika.lale@xxxxxxxxxxxxxx>, "oracle-l" <oracle-l@xxxxxxxxxxxxx>
- Date: Thu, 28 Sep 2006 11:57:02 -0500
Hi Lale,
One would expect to find it here:
http://h10010.www1.hp.com/wwpc/me/en/sm/WF06c/A1-1769079-1769113-1769113-1769139-1769139-16169139.html
Nothing really available on their site...
However, estimate IOPS is relatively easy with
Spindle IOPS = ((RPM/60)/3)*2
Or at least ~167 8k IOPS per spindle
To figure out User Data Transfer rates, use the following:
UDT=(Spindle Speed / 60 * Sectors Per Track * Bits per Sector * 8) / 1,000,000
Bits Per Sector as defined by HP can be here:
http://h18000.www1.hp.com/products/quickspecs/11531_div/11531_div.HTML
<http://h18000.www1.hp.com/products/quickspecs/11531_div/11531_div.HTML>
So BPS=512
The other two number we need is the platters used in this 146GB drive and the
physical platter size (3.5", 2.5", 1", and I would assume 3.5") to determine an
areal density or at least GB/Platter density to determine the inner & outer
range of UDT. It will be a wide range considering Zone Bit Recording (ZBR)
BTW, the whole U320 MB/Sec transfer is a U320 SCSI transfer rate and not the
user data transfer rate for the drive itself.
Michael Erwin
Hotsos Enterprises, Ltd.
http://www.hotsos.com
Hotsos Symposium 2007 / March 4-8
Visit www.hotsos.com for curriculum and schedule details...
________________________________
From: oracle-l-bounce@xxxxxxxxxxxxx on behalf of lale obradovic
Sent: Thu 9/28/2006 12:19 PM
To: oracle-l
Subject: IO rate for U320 SCSI 15K RPM Hard Drive
Hi All,
Does anyone have some information of expected IO rate (IOPS and/or MBPS) for
U320 SCSI 15K RPM Hard Drive (HP 146GB U320 15K Universal HDD)?
Thanks!
Lale
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