Do I have to use a RAID controller?

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jadog

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I just bought an HP Proliant N40L microserver, and it has an onboard raid controller. I set it to RAID1 in the bios so the two drives could mirror and I would be protected with data redundancy in case one of the drives fail. When I went to install Proxmox, it sees it as two separate drives instead of one. Is my only option to buy a RAID PCI card or will that even work? I also came across this link on a workaround to this issue, but I don't know if it will work: http://layer0.de/~kai/howto/proxmox/howto_proxmox_raid.html#doc_chap6. My end goal here is to get proxmox to see both drives as a single drive. Any suggestions?
 
jadog said:
I just bought an HP Proliant N40L microserver, and it has an onboard raid controller. I set it to RAID1 in the bios so the two drives could mirror and I would be protected with data redundancy in case one of the drives fail. When I went to install Proxmox, it sees it as two separate drives instead of one. Is my only option to buy a RAID PCI card or will that even work? I also came across this link on a workaround to this issue, but I don't know if it will work: http://layer0.de/~kai/howto/proxmox/howto_proxmox_raid.html#doc_chap6. My end goal here is to get proxmox to see both drives as a single drive. Any suggestions?
Click to expand...

Hi,
you don't have an real raid-controller - it's called fake raid-controller - all raid function must done be a driver. Go for an real (and good) raid controller.

IO is very important for virtualisation and normaly you won't miss an good raid controller with fast disks (and the right raidlevel) if you have used one.

Udo
 
udo said:
Hi,
you don't have an real raid-controller - it's called fake raid-controller - all raid function must done be a driver. Go for an real (and good) raid controller.

IO is very important for virtualisation and normaly you won't miss an good raid controller with fast disks (and the right raidlevel) if you have used one.

Udo
Click to expand...

Yea, I'm starting to realize that. So do you have any suggestions for a real raid controller? Was hoping not to have to spend too much more.
 
jadog said:
Yea, I'm starting to realize that. So do you have any suggestions for a real raid controller? Was hoping not to have to spend too much more.
Click to expand...
Hi,
i'm a friend of areca-controller (sas). Fast but not very cheap.

With an ARC-1222 and 4 SAS-Drives (HUS154545VLS300) in raid-10 I got this values (the server is a little bit busy):
Code: 
pveperf /var/lib/vz
CPU BOGOMIPS:      29475.13
REGEX/SECOND:      1153691
HD SIZE:           543.34 GB (/dev/mapper/pve-data)
BUFFERED READS:    408.41 MB/sec
AVERAGE SEEK TIME: 5.64 ms
FSYNCS/SECOND:     5022.75
Udo
 
we have some (older) HP microserver in our lab, one of them is using a adaptec 6405/6805 with AFM-600
 
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