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walthy46
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Mixed spindle speed on Perc 6i controller

I have two SAS 146GB 15k drives configured as RAID 1.  I want to add two SAS 146GB 10k drives and reconfigure as RAID 6.  Am I going to have any problems because of the different spindle speeds?  The original RAID 1 is the boot volume and is on connector 0.  The two additional drives are also on connector 0.  Connector 1 has two SAS 2TB WD-RE drives working @7.2k in a RAID 1 configuration and are working fine.

I already have the new drives installed and they are working fine and I'm now ready to reconfigure to RAID 6.

Questions:

1)  I expect that the Perc 6i has already slowed to the 10k speed for I/O but I am not sure.  Is mixing the spindle speeds going to cause any other problems beside the slowdown in access?

2)  Before I reconfigure the RAID should I be doing anything special, such as running a consistency check first on all of the drives?

3)  Can this be done on a working system? (After a full backup, of course!)

4)  Is there anything else I should know before doing this?

Thanks

 

Walt

Dell Venue 8 Pro with Windows 10 1511 Update, lots of other Dell Servers and PCs.

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2 Replies
walthy46
1 Nickel

RE: Mixed spindle speed on Perc 6i controller

I found a partial answer by   at http://en.community.dell.com/support-forums/disk-drives/f/3534/t/19542035.aspx 

Thanks to theflash1932.

 

Walt

Dell Venue 8 Pro with Windows 10 1511 Update, lots of other Dell Servers and PCs.

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theflash1932
6 Indium

RE: Mixed spindle speed on Perc 6i controller

Smiley Happy

1. The speed of the 15K drives will ONLY be affected if you add 10K drives in an array with the 15K drives.  If not configured yet, then the RAID 1 should still be treating the drives with 15K access.

2. Ideally, you should run diagnostics to make sure drives are healthy, update firmware and drivers, and run a consistency check before doing a reconfigure.  There is "usually" no harm in skipping, but by doing the above you significantly decrease the possibility of problems during the process.

3. Yes, this can be one while the system is live, without affecting data.  There may be a moderate degradation in performance during the process, so off-hours is recommended, but it can be done either way.  A backup is always recommended before changes Smiley Happy

4. ??  It is fairly straightforward.  Good luck!

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