dit is het antwoord op een mailtje van mij aan maxtor over de slechte raid peformence (ik heb het nog niet gelezen, geen tijd):
Dear Sir or Madam,
If you are experiencing performance problems with your hard drive there are
a number of ways to troubleshoot the problem:
The data transfer rate, stated in Mb/s on the ATA hard disk specification
sheets, is merely a theoretical value.
Data clusters can differ in size and are not always arranged in order. This
results in an actual lower data transfer rate.
A)Check whether the hard drive(s) are using MS-DOS Compatibility mode.
To do this go to System Properties and select the Performance tab. If the
drive is using compatibility mode it will be listed here. For more
information on this see also:
http://support.microsoft.com/default.aspx?scid=kb;EN-US;q175629
B)Make sure the drive(s) are connected to a UDMA (40 pin, 80
conductor) cable. This applies even if your system does not support UDMA.
C)Separate the drives. Connect both separately as master drives on
the Primary and Secondary controllers or try them one by one as Primary
master to see whether this makes a difference to the performance of the
drives. When doing this please ensure that any other devices on the cables,
for example CDROM, DVD, zip drives are disconnected.
D)Check which drivers are loaded for your hard disk controller (bus
master drivers). If the bus master driver is not the correct one or if you
are using the standard Windows drivers it may reduce the performance of your
hard drive attached to that controller. If you have recently re-installed
the operating system, this is a likely cause for your problem. If you are
not sure whether or not your have the appropriate drivers please check with
your system or motherboard manufacturer for the correct ones. If the
motherboard/controller specific drivers are being used, try installing the
generic Windows bus master drivers instead to see if there is an improvement
in performance.
E)In order to test the data transfer rate of a hard drive you should
connect it as the only drive to the standard ide controller on the mainboard
and use a DOS based programme such as H2Bench
ftp://ftp.heise.de/pub/ct/ctsi/h2bench.zip for testing.
F)If your system only supports UDMA 33, it might cause compatibility
problems with a drive that supports UDMA 133, UDMA 100 or UDMA 66. However,
we have developed a utility so that, if necessary the UDMA mode of the hard
drive can be manually set down to whichever mode is suitable to your system.
This program can be downloaded from our website
http://www.maxtor.com/softwaredownload/default.htm This same utility can
also be used to set the UDMA mode back up if, for example, you decided to
upgrade your motherboard. Please note that at the moment we do not have a
software solution to fix this BIOS bug for the D540X-4K and D740X product
families. We would recommend contacting your motherboard manufacturer to
see if it is possible to obtain a BIOS upgrade which eliminates this
problem.
G) Please test the drive for faults with our diagnostic tool PowerMax which
can be downloaded from our website
www.maxtor.com.
H) Some Onboard Raid Controllers are "lite versions" and will not work with
the same performance as a PCI Raid Controller Card. If you are using your
hard drive in a RAID configuration please also test it as a single drive on
the onboard IDE controller. Should the drive achieve an acceptable result,
the performance problems could be caused by a driver or a conflict under
Windows. In that case you should contact either the manufacturer of your
RAID controller or Microsoft customer support for further assistance.
You'll find some more information on performance problems with RAID
Controllers on the following website:
http://www.tecchannel.de/hardware/817/index.html
I) Heat issues can also influence the performance of a hard drive.
Especially in RAID arrays hard drives can get very hot. Make sure to provide
adequate cooling.
If you have any questions please don't hesitate to contact us. In order to
allow us to deal with all enquiries as efficiently and accurately as
possible we would ask that you include any previous emails when replying to
us.
Kind Regards,
Technical Support Team, Maxtor Ireland Ltd.
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=-=
| MAXTOR Technical support / customer Service
|
|Technical assistance and customer support is available from
|
|8.30am to 5pm (GMT) Monday to Thursday and from 8.30am to 4pm (GMT) Friday.
|
+---------------------------------------------------------------------------
--+
|
Multilingual Support: English, French and German
|
|
|
| MAXTOR Ireland Ltd | Phone ++353 1 204 1111 (All countries)
|
| |08 25 31 43 22 (in
France)|
| | 01801 629867 (in
Germany)|
| Bray Business Park | Fax ++353 1 286 1419
|
| Southern Cross Rd, Bray | Order documents from our 24 hour fax
|
| Co Wicklow, Ireland. | retrieval system: Faxback ++353 1 204 1122
|
| VAT No. IE 6564121M | E-mail eurotech_assistance@maxtor.com
|
|
|
|Maxtor on the Internet:
http://www.maxtor.com
|
|
|
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
=-=
-----Original Message-----
From: ejraaverok@hotmail.com [mailto:ejraaverok@hotmail.com]
Sent: Friday, June 21, 2002 9:32 PM
To: eurotech_assistance@maxtor.com
Subject: Raid
********************************************************************
********************** Submitter Details ***************************
FirstName: Ernst
LastName: Ravoerok
Email: ejraaverok@hotmail.com
Phone: none
*********************************************************************
********************** Support Request Details **********************
Location: Europe
Language: English
Request Type: Technical
Manufacturer: Maxtor
Drive Model: d740x
Product Line: ATA/IDE Drive
Product Serial #:
Product Part #:
Operating System: Windows XP Version:
Computer System: Kr7a raid, 512mb crucial
CPU: AMD K7 (Athlon)
CPU Speed: 1000MHz
Controller Card: High Point Raid
Every day is a start of something new, and every evening ends with the splendid dawn of a new day
:strip_icc():strip_exif()/u/27447/70.jpg?f=community)
/u/12281/maan.png?f=community)
/u/15411/webicon.JPG?f=community)
:strip_icc():strip_exif()/u/13224/icon.jpg?f=community){kind=icon}
/u/58478/ship_1024_60x60.png?f=community)
