2 things I would suggest:
First, verify that I/O on the array is good. I'm not familiar with what
windows tools are available but in unix I use 'mkfile', 'dd', and
'iostat' alot for this sort of testing.
Second, if I/O is ok, use windows backup to test backup throughput
outside of NBU.
If both of these pass muster then it's NBU, if either or both show
issues you've got something more to go on.
~JK
"WEAVER, Simon" wrote:
>
> Hi
> That may be the case, but the problem then is to try to prove that, or even
> better, find the problem!
> My understanding is that all the Fibres for the arrays have been replaced as
> well as the GBIC cards, that are used to connect the Compaq Arrays to the
> Vixel.
>
> Is there anything else that could be the cause?
>
> Simon Weaver
> NT Domain Administrator
> Ext. 5544
> Tel: 02392-705544 (Direct Dial)
> Simon.Weaver AT Astrium-Space DOT com
>
> -----Original Message-----
> From: Acklin Michael - mackli [mailto:Michael.Acklin AT acxiom DOT com]
> Sent: 26 September 2002 01:14:PM
> To: WEAVER, Simon; 'Spearman, David'
> Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: RE: [Veritas-bu] Is Netbackup to blame
>
> Sounds like a possible problem with I/O on the
> recreated partition.
>
> -----Original Message-----
> From: WEAVER, Simon [mailto:Simon.WEAVER AT astrium-space DOT com]
> Sent: Thursday, September 26, 2002 6:51 AM
> To: 'Spearman, David'
> Cc: 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: RE: [Veritas-bu] Is Netbackup to blame
>
> HI,
> I would tend to agree with that, but the backups are actually performed
> through a Fibre Switch, and thus not even going through a Network, as the
> Arrays are going through the same Switch.
>
> The problem most definitely started after recreating the partition and
> restoring the Data. I should point out the NT Operating System was
> unchanged, and there was no need to restore this.
>
> Everything has been checked and re-checked! Yet it is still a mystery to me
> :(
>
> Simon Weaver
> NT Domain Administrator
> Ext. 5544
> Tel: 02392-705544 (Direct Dial)
> Simon.Weaver AT Astrium-Space DOT com
>
> -----Original Message-----
> From: Spearman, David [mailto:spe08 AT co.henrico.va DOT us]
> Sent: 26 September 2002 12:43:PM
> To: WEAVER, Simon; 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: RE: [Veritas-bu] Is Netbackup to blame
>
> For what it's worth, everytime we see one of our NT/W2K servers go into slow
> mode the first thing we check is the network settings. Everything must be
> checked, NIC settings, switch settings, router settings, in short,
> everywhere that piece of wire goes must be investigated. We have invariably
> found somewhere along the way settings that don't match,ie, NIC at 100/full,
> switch at 100/half. Don't forget the condition of the wire either, a cable
> that rings out may still have a problem.
>
> David Spearman
> County of Henrico, Va.
>
> -----Original Message-----
> From: WEAVER, Simon [mailto:Simon.WEAVER AT astrium-space DOT com]
> Sent: Thursday, September 26, 2002 7:31 AM
> To: 'veritas-bu AT mailman.eng.auburn DOT edu'
> Subject: [Veritas-bu] Is Netbackup to blame
>
> Hello,
> I have a question regarding our current Backup throughput to one of our most
> critical Windows NT Servers. Prior to a hardware failure on our Server, we
> were getting approx 4.5MB a second on backups within a stream.
>
> We had a hardware failure with a Compaq Array 4000. Our Data was spread
> across 2 of these Compaq Arrays. We recreated the NT Partition and restored
> the Data.
>
> Now, we are unable to get any good backups, and throughput has been reduced
> from 4.5MB to 100k/second. Sometimes if we are lucky in the evenings, we get
> 422k/Second.
>
> On all our other backups, through put is exactly the same. It is only
> focused on the Server that had the disaster! I am at a complete loss as to
> what the actual problem is!
>
> Has anyone ever come across this problem or seen anything like it? If anyone
> has any tips, please tell me! I am happy to call you and give further
> details if required!
>
> Thanks
>
> Simon Weaver
> NT Domain Administrator
> Ext. 5544
> Tel: 02392-705544 (Direct Dial)
> Simon.Weaver AT Astrium-Space DOT com
>
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--
=====================
Jeff Kennedy
Unix Administrator
AMCC
jlkennedy AT amcc DOT com
|
