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You must configure the disks, for them to be available to the OS.
The good thing is, that you can create RAID 0 on 1 disk only.
Personally I would buy the battery, and get a HW RAID 5.
The good thing is, that you can create RAID 0 on 1 disk only.
Personally I would buy the battery, and get a HW RAID 5.
Sorry for the late reply, but I have been away and ill.
As Viveki wrote, You need additional cache/Battery to enable RAID 5 Support, on the the or some of the Smart Array Pxxx Controllers.
The Smart Array controllers do support RAID 5. But for some reason, you now need to have backup battery on the Cache for RAID 5 support to be enabled.
I can't tell you why HP has introduced this. On the Legacy Smart Array's, the battery was only required to enable write cache.
So what is this battery?
You got read cache and write cache.
On the legacy controllers, Compaq had a policy, saying, that they did not want to put customer data at risk. So for the write cache to be enabled, a battery had to be installed, to supply backup power for the write cache, so that the cache could hold the data, that wasn't written to the disks, in case of power loss. This battery was an option, that the customers who wanted it could buy it.
Over the years the battery has had many names, like Write cache enabler, BBWC (Battery Backed Write Cahce) and more.
In most cases, it's pretty much a rechargeable battery.
In a few cases it has been fixed to the cache module, so you would get a new cache module, when obtaining it.
On some, if not all of the Smart Array P models, the policy now, is that you have to install the battery to enable RAID 5.
My guess, is that HP want to increase the protection af your data.
What I'm telling you, is that the price for the battery is low, to get the feature, that you want.
A HW RAID is faster than a SW RAID, and don't put the workload on the servers CPU's.
I don't know aboute Linux, but with Windows you need to start the rebuild manually.
And if you got a failed disk 0, in a SW mirror, and a non hotswap disk, You need to know how to do it correctly.
And on HP-UX it's very complex.
With the smart array, you just replace the disk, and it will do everything for you.
As Viveki wrote, You need additional cache/Battery to enable RAID 5 Support, on the the or some of the Smart Array Pxxx Controllers.
The Smart Array controllers do support RAID 5. But for some reason, you now need to have backup battery on the Cache for RAID 5 support to be enabled.
I can't tell you why HP has introduced this. On the Legacy Smart Array's, the battery was only required to enable write cache.
So what is this battery?
You got read cache and write cache.
On the legacy controllers, Compaq had a policy, saying, that they did not want to put customer data at risk. So for the write cache to be enabled, a battery had to be installed, to supply backup power for the write cache, so that the cache could hold the data, that wasn't written to the disks, in case of power loss. This battery was an option, that the customers who wanted it could buy it.
Over the years the battery has had many names, like Write cache enabler, BBWC (Battery Backed Write Cahce) and more.
In most cases, it's pretty much a rechargeable battery.
In a few cases it has been fixed to the cache module, so you would get a new cache module, when obtaining it.
On some, if not all of the Smart Array P models, the policy now, is that you have to install the battery to enable RAID 5.
My guess, is that HP want to increase the protection af your data.
What I'm telling you, is that the price for the battery is low, to get the feature, that you want.
A HW RAID is faster than a SW RAID, and don't put the workload on the servers CPU's.
I don't know aboute Linux, but with Windows you need to start the rebuild manually.
And if you got a failed disk 0, in a SW mirror, and a non hotswap disk, You need to know how to do it correctly.
And on HP-UX it's very complex.
With the smart array, you just replace the disk, and it will do everything for you.
I'm well again, Thank you.
lack of knowledge, all ways generate more work.
I'm not sure, if you need to do training.
It all depends on what you need to do in the future.
If you are going to work a lot on proliants in the future, training is nice.
otherwise - read the manuals, and ask the questions.
Cheers
/jag
lack of knowledge, all ways generate more work.
I'm not sure, if you need to do training.
It all depends on what you need to do in the future.
If you are going to work a lot on proliants in the future, training is nice.
otherwise - read the manuals, and ask the questions.
Cheers
/jag