akersrus101
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RAID configuration
Hello,
We bought a server about a year ago, it has given nothing but trouble. The raid was configured badly , 4 disk array RAID 10. Now the I/O on the disks is slow and due to a lack or ram , they are constantly paging to the point the server will become not responsive and needs rebooted every 2 to 3 days. So to start with I am looking at putting in new 15,000 RPM disks rather than 7,200. I want to reload the OS on the new disks. Now for my question. I am not experienced with server os's so I want to number the current disks and set them aside. Remove the RAID controller and sit it aside. So if I cannot get the new disks loaded and configured, I can put the old parts back and boot the server for Monday business. Will the LSI raid controller hold the configuration if pulled and replaced as I described?
Thank you
We bought a server about a year ago, it has given nothing but trouble. The raid was configured badly , 4 disk array RAID 10. Now the I/O on the disks is slow and due to a lack or ram , they are constantly paging to the point the server will become not responsive and needs rebooted every 2 to 3 days. So to start with I am looking at putting in new 15,000 RPM disks rather than 7,200. I want to reload the OS on the new disks. Now for my question. I am not experienced with server os's so I want to number the current disks and set them aside. Remove the RAID controller and sit it aside. So if I cannot get the new disks loaded and configured, I can put the old parts back and boot the server for Monday business. Will the LSI raid controller hold the configuration if pulled and replaced as I described?
Thank you
Senthil Kumar
The RAID configurations are stored in the RAID controller only.so the new disks and controller will hold the new config only.
upgrading to 15K RPM drives won't fix the problem. You are starved for RAM (based on your symptoms).
If running windows, run perfmon (performance tools), or if running UNIX, look at top.
If running windows, run perfmon (performance tools), or if running UNIX, look at top.
ASKER
my question is, if I remove the old Raid card and old drives then put them back in the same order they came out, will the system still boot? (will the raid controller hold it's configuration) The faster drives alone will not solve the problem , but memory and faster drives sure won't hurt.
It will complain, but yes, you can do that.
A smarter thing to do would be to use all 8 disks, and create another RAID10, and migrate data to split the load.
A smarter thing to do would be to use all 8 disks, and create another RAID10, and migrate data to split the load.
The disks hold the metadata for the configuration as well as the card. If you're removing both the disks and the card then when you put them back they won't even complain about the config changing. If you use the controller with te new disks though and then want to put the old ones back onto it you'll have to import the foreign config from the disks.
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ASKER
My comment was in reply to the answer.