topic Re: regarding raid disk. in MSA Storage

regarding raid disk.

Aamir14 — Tue, 22 Oct 2013 12:34:14 GMT

hello,

I have eva4400 server msv 300.

its have 4 enclusure and each enclusure have 8 hard disk.

and i configured raid 5.

my question is that

its 3 disk pair raid or 8 disk raid controller.

my question is that

its configure all 8 disk pair.or three three disk pairs.

Thanks

aamir

Re: regarding raid disk.

Torsten. — Tue, 22 Oct 2013 12:56:47 GMT

Not exactly sure about the question ... if all 32 disks are in the same diskgroup, then your vRAID5 vdisk is on all 32 disks.

Re: regarding raid disk.

Aamir14 — Tue, 22 Oct 2013 19:57:42 GMT

thanks

storage have 36 disk and default disk group configure

raid 5.

and i used total 90% of disk space.

suppose two or three disk failed in same time

data will lost or not.

two or three disk failed in same enclusure data will lost or not.

thanks

amir

Re: regarding raid disk.

Torsten. — Wed, 23 Oct 2013 05:43:13 GMT

It depends.

2 or more disk failures *at the same time* are very unlikely. If a disk fails, the array will rebuild and is *fully redundant* again, as long as there is space enough. So replace each failed disk asap. Under special circumstances more than 1 disk can fail at the same time without data loss, this depends on the internal data layout.

Imagine a 4 disk mirror - if you loose the both mirrors you will survive, if you loose a mirrored pair, you loose your data. This example will apply, more or less.

Re: regarding raid disk.

Aamir14 — Wed, 23 Oct 2013 07:25:32 GMT

Hi,

Thanks for helpful advice

Last week one hard disk failed condition so,

I was replaced the new hard disk but after two days San generated an error messages

not more

I also inserted to different bay but still same problem

now amber led blinking continuously SAN front panel.

Please see the attached mail.

Thanks

Aamir

Re: regarding raid disk.

Torsten. — Wed, 23 Oct 2013 07:32:04 GMT

The attachment is showing a failed disk. I would restart the P6000 command view service to ensure you see a current status.
If the status is still the same, this disk is dead.

Re: regarding raid disk.

Aamir14 — Wed, 23 Oct 2013 07:46:49 GMT

hi,

Will this service have any impact the existing server which is under production environment ?
as we cannot afford any downtime

service name

The Command View EVA

thanks

Aamir

Re: regarding raid disk.

Torsten. — Wed, 23 Oct 2013 07:55:25 GMT

No effects. The service is just for management of the array.