Environment:. Storage: HP P2000 MSA G3 SAS Array with 24 300GB 10k SAS Disks. Two Storage Controllers with redundant SAS connections to each host. Hosts: Three HP DL380 G7s with a 10GB SD Card, CPU, Ram, etc. ESXi 5.0 is installed on the SD card in each host, this is the only local storage on each host. I have the P2000 split into two vDisks, each using 12 of the 24 disks. Call them LUN1 and LUN2.
Each LUN is its own RAID6 volume. I spoke with HP support over the phone about layering RAID1 over my two RAID6 arrays. This is not possible, so I'm trying to figure out what the best way might be to implement mirroring. I was looking at OpenFiler and FreeNAS, but honestly don't know how those solutions would work in a mission critical application. There's no software RAID option for the setup you've described.
VMware won't support it. If your hosts were Linux/Windows, you'd have some additional options. If your concern is system stability, you could have used RAID 1+0 and/or designated hot-spare drives in your setup. If performance isn't a concern (e.g.
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The use of RAID6), why worry about the potential impact of a RAID6 rebuild? RAID6 on enterprise SAS drives is usually deemed overkill (versus RAID5) because of the quick(er) rebuild times than nearline/7,200rpm disks. However, you're also doing this across a larger group of disks than normal (12 drives is a lot for that RAID level). Why stress the system with a Storage vMotion away from the faulted LUN?
I tried to install ESXi 5.1 on a HP Proliant Dl160 G6, with 4 hard drives of 2 TB in RAID 1 + 0 array, using a HP b110i controller. The b110i is a RAID controller-based software that does not support the ESXi. As you have noticed it will not recognize the individual disks and it work perfectly with them as.
These are standard HP SAS disks. They don't fail so often that you can't get a replacement in place in a timely manner. But the best insurance here is to have a hot-spare disk configured and maybe a cold-spare drive handy to reduce the amount of time it takes to replace a disk. Have you had a drive fail on this array before? @Lucretius if you really need mirroring across the two vDisks, the way to go seemingly would be to expose both of them as data stores to vSphere, create virtual disks on both and use software mirroring in the guests' OS instances. VSphere/ESXi is rather forgiving about datastore outages in terms that it would not switch off or stall your VMs, but the scenario would require thorough testing nonetheless.
If you have an environment which is already in production, this might not be the time for testing though. – May 28 '13 at 15:02.
Last updated 18th June 2018 Objective Redundant Array of Independent Disks (RAID) is a utility that mitigates data loss on a server by replicating data across two or more disks. The default RAID level for OVH server installations is RAID 1, which doubles the space taken up by your data, effectively halving the useable disk space.
This guide will help you configure your server’s RAID array in the event that it needs to be rebuilt due to corruption or disk failure. Requirements. a with a software RAID configuration. administrative (root) access to the server via SSH Instructions In a command line session, type the following code to determine the current RAID status. Cat /proc/mdstat Personalities: linear raid0 raid1 raid10 raid6 raid5 raid4 multipath faulty md2: active raid1 sdb2 1 sda2 0 sdc2 2 96211904 blocks 3/3 UUU md1: active raid1 sdc1 2 sdb1 1 sda1 0 20478912 blocks 3/3 UUU unused devices: This command shows us that we have two RAID arrays currently set up, with md2 being the largest partition. The partition consists of all three disks, which are known as sda2, sdb2 and sdc2. The UUU means that all the disks are working normally.
An F would indicate a failed disk. Although this command returns our RAID volumes, it doesn't tell us the size of the partitions themselves. We can find this information with the following command.
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