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How do I replace a SCSI drive

Posted on 2008-10-07
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Last Modified: 2012-05-05
I need to change a bad SCSI drive in Compaq ProLiant ML350 G3. It has 3 drives in a RAID 5 setup. I can find no documentation on how to do this and there is nothing that allows me into the RAID config during boot like LSI or Adaptec ie Control + M or Control +S. I have the proper replacement drive.
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Question by:signaltracker
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by:andyalder
ID: 22659599
ML350 G3 came in RAID and non-RAID models so first you need to find out which. Hopefully the Array Configuration Utility is installed (start-HP system tools if Windows). You can see there if it has a Smart Array 641 or is a non-RAID model.
Assuming it is a RAID model then press the magenta button to release the handle, pop it out 1/2" and let it stop spinning for 30 seconds, then shove the other one in and the controller will rebuild the array automatically.
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by:signaltracker
ID: 22662929
Thanks for the help.

it is a Smart Array 5300 Parallel SCSI Array I do have HP's ACU 8 installed.

The Server has only 3 hard drive holders to pop out.  0, 1 and 2. I have to physically remove the hard drive from it's tray (for lack of a better word), insert the new hard drive in the tray, then I can slide it back into slot 2.I will have to physically remove the bad one, put it in the hard drive tray that slips into the bay so I can not easily slip it out and wait for it to spin down. It will take me a few minutes. But I am assuming that you are telling me that if I let it spin down, remove it, slide the now one in, it will rebuild itself automatically. I do not have to power down the server...am I correct??
thanks
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by:andyalder
ID: 22664279
Yes, that's correct. Please don't power down the server; the Smart Array 5300 is designed around hot-swapping of failed disks. Cold swapping can have unpredictable consequences.

If the disk/caddy is going to be out for a long time (1/4 hour?) you should fill the hole with a disk blank to maintain correct airflow. If there's a big hole in the front the other disks won't get enough airflow. I wouldn't worry much about that unless it's in a really hot environment.
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by:signaltracker
ID: 22664616
thanks for the info,

One last question: When I do the hot swap, will I see any graphic representation of what is going on? How will I know when it is complete, that it worked...etc ? Should I be running some program while I do the hot swap? The room that the server is in is pretty cool, and I can always remove the side panel if it gets too hot for just a quarter hour. It probably wont take more than 10 mins to do the disk swap out. I'm a networking guy, this SCSI hardware stuff is where i am pretty weak. is there any written books, doc, etc about repair of SCSI / RAID ? I have a bigelows, but it is not much help. I have done a swap out on an LSI card but was not a hot swap. I had to go into the RAID interface during reboot which was not that bad.

thanks for the help.
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andyalder earned 500 total points
ID: 22666842
The yellow arrow lights will come on on the disks to indicate rebuild is in progress, if you open the Array Configuration utility during the rebuild it will tell you that rebuild is in progress but won't give a percentage complete. It'll rake several hours to complete but you can keep using the server while it is doing it.

Removing the side panel would give even less air flow through the disk bays but if the room isn't hot it doesn't matter.
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by:signaltracker
ID: 31503840
Thanks for the help
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