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6.3

Unexplainable sudden drop in RAID 5 Throughput

Asked by adramis in Computer Servers

Tags: HP Proliant RAID Disk Array Throughput performance backups

Hello All,

I am running Exchange 2003 on an HP Proliant DL380 3.06Ghz, 2GB RAM, with RAID 1+0 logical drive for the C:\  (9GB free out of 40GB) and RAID 5 logical drive for D:\ data in four physical drives (33GB free out of 203GB). MDBDATA totals 162GB.

Everything has been smooth literally for years, but throughput on the D:\ data volume suddenly dropped drastically over the course of a single day and has remained low. Throughput is one 7th what it used to be, and backup has gone from 3 hours to 12 hours. But not just backup, any file copy or throughput tests show the degradation. It doesn't matter if the Exchange databases are mounted or not. HP Management utility reports no degraded components, Windows Disk Manager reports a Healthy partition, and Event Viewer shows no disk errors. I've tried scheduling a CHKDSK D:\ /F, but when I reboot and it starts the CHKDSK, the whole process takes about 10 seconds.

Can anyone suggest what may be the problem with throughput? Also, why I can't seem to run CHKDSK?

Thank you.

Richard
 
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Zone: Computer Servers
Tags: HP Proliant RAID Disk Array Throughput performance backups
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Solution Provided By: lnkevin
Participating Experts: 4
Solution Grade: B
 
 
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