HP RAID 5

[olivia]

Dear All,

I am new to the forum and I trust that you all will help me to learn something. I do will share what I know.
For learning I have created a scenario my HP DL 380 server to learn this compex RAID but couldn't succeed, but hope you experts will have a solution.

Scenario

HP SAS 146 GB, 3 Drives in HP Server with P400 smart Array.
Using ACU CD I created the following partitions over the 3 Disks.

Logical volume 1- RAID0 - 50 GB - OK
Logical Volume 2- RAID 5 - 240.5 GB - OK

After copying some files to RAID 5, I deleted RAID5 (240.5 GB) through Embedded ACU and then checked after booting from LIVE CD.
Now only 50GB is viewable and rest of the volume is not showing in the Diskpart on live CD.

Then I deleted RAID 0(50 GB) also and tried virtual RAID method as I normally do with HP servers, though I get the volume 240.5 GB; files are corrupted.

I tried UFS explorer with following parameters
Stipe size – 64KB, parity rotation-left async with parity-delay 16 on RAID 5 over 3 disks.

Please guide me..

[hddguy]

Make regions or adjust start offsets - you have 2 raid levels and need to work with both seperate

[olivia]

Thank you hddguy.

So you mean, I should create regions on each disk and then create virtual RAID according to the config over the regions and try?..

[olivia]

but what should be the size of the regions?..
it cannot be 50 GB for first partition, because it is RAID 0 over three disks.. right??
Does it have any calculation criteria?

[hddguy]

For RAID0, you need not specify offsets or regions, offset should be '0' and partitions will be accessible. For RAID5 you need find correct start sector and work with RAID5 with delay starting at this position. you also need to find disk order as it could change from RAID0 order.

[DR-Kiev]

Does it have any calculation criteria?

Yes. It is easy can be calculated if you know more specificaly size of first partition and raid type .

[olivia]

Dear Friends..

I expect your suggestions on this problem.. If someone has the solution.. I am ready to purchase it..!
please ...

[DR-Kiev]

Dear Friends..

I expect your suggestions on this problem.. If someone has the solution.. I am ready to purchase it..!
please ...

Check PM

[pcimage]

Dear Friends..

I expect your suggestions on this problem.. If someone has the solution.. I am ready to purchase it..!
please ...

"Dr-Kiev" is your man.

[olivia]

oh Dr-kiev.. my bro...
will come and meet you shortly