RE: [ActiveDir] Write Cache Enabled

jon.gimpel Mon, 01 Nov 2004 16:22:53 -0800

Title: [ActiveDir] Write Cache Enabled

It ultimately depends on your faith with the Array Controller. We have been using Compaq (HP) Smartarrays (several thousand of them) since its inception back in 1997 (or 96?) and has always been positive. Most of HP's SmartArrays are battery backed up to prevent lost write commits. E.g. if a server suddenly loses power while the data is in cache, as soon as the server cycles back on, the data is immediately committed. There are some versions of onboard arrays which do not have battery back up - like older 380's and 360s, if that is the case, I would definitely not use write caching without that added battery protection.

-Jon

From: Robert Rutherford [mailto:[EMAIL PROTECTED] On Behalf Of Robert Rutherford
Sent: Monday, November 01, 2004 7:13 PM
To: [EMAIL PROTECTED]
Subject: RE: [ActiveDir] Write Cache Enabled

I'm not an expert on storage, but I had this error on Compaq servers for years and never had an issue with them. I ran 30 plus domain controllers which generated the error on build but went quiet post.

Maybe someone else can give you an answer. In my experience it's no concern.

Rob

From: [EMAIL PROTECTED] on behalf of Rodney Gardiner
Sent: Mon 01/11/2004 23:46
To: [EMAIL PROTECTED]
Subject: [ActiveDir] Write Cache Enabled

I keep getting an error on one of our DC's stating that Write Disk Cache is
enabled and if there is a system failure data corruption may occur.

I have informed that this should not be enabled on a DC.

I checked out Tech Net on the various errors I receive in the Event Viewer
and it states generally the error can be ignored and that there is a hotfix
that you must call Microsoft for to stop the error appearing.

http://support.microsoft.com/default.aspx?scid=kb;en-us;830051

I was also informed that taking off the option for Write Disk Cache would
have a big impact on the system performance. I understand it would have an
impact but did not think it would be as big as I am being told.

I was just after clarification as to whether it should be enabled on a DC or
not.

Any help would be appreciated.

It is an SCSI Controller with Adaptec System SCSI Disk Device. It is the
disk device that has Write Cache Enabled on it under its properties.

Rodney

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of
[EMAIL PROTECTED]
Sent: Tuesday, 2 November 2004 10:16 AM
To: [EMAIL PROTECTED]
Subject: RE: [ActiveDir] locked out

Rodney,

this is a free download from ms under account management tools. Search
under MS, you will find it.

+---------------------------------------------------------------------+
Regards,

Sandy Wu
LADOTD IT. Tech. Support
Office: (225) 379-1625
Hrs:6:30AM-3:00PM Central Time
Email:[EMAIL PROTECTED]
+---------------------------------------------------------------------+


             Rodney Gardiner
             <rodney.gardiner@
             vls.com.au>                                                To
             Sent by:                  [EMAIL PROTECTED]
             [EMAIL PROTECTED]                                          cc
             ail.activedir.org
                                                                   Subject
                                       RE: [ActiveDir] locked out
             11/01/2004 04:16
             PM


             Please respond to
             [EMAIL PROTECTED]
                tivedir.org



Just curious as to where this lockedoutstatus.exe is kept?

Rodney

_____

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of Randy White
Sent: Tuesday, 2 November 2004 7:31 AM
To: [EMAIL PROTECTED]
Subject: RE: [ActiveDir] locked out

This is probably caused by a virus. Use lockedoutstatus.exe to find out
what where the lock outs are originating. Then check the event log of that
DC to find out the perpetrating computer.

_____

From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, November 01, 2004 2:29 PM
To: [EMAIL PROTECTED]
Subject: [ActiveDir] locked out

All gurus,

Wonder if any of you have experienced this before.

Suddently over the weekend, all domain accounts ( i mean all ) are locked
out except the domain admin accounts. What could have caused this problem ?
The only clue that I had is this is the week to change the summer time
back but we had this done every year, had never had this issue before. Could
this be a worm of some sort of virus. Looking into our security log it did
not show me nything out of norm ( faild security , locked out has been
turned on)

Any suggestions will be appreciated.

Regards,

Sandy

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RE: [ActiveDir] Write Cache Enabled

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