[cisco-voip] UCS C210 Replace 146 GB Disk in RAID5 with 300 GB Disk

[Charles Goldsmith]

Keep in mind, RAID 5 is ok for smaller disks, but larger disks it's no
longer recommended, but sadly, the best article about it is from Dell:
http://en.community.dell.com/techcenter/b/techcenter/archive/2012/08/14/new-equallogic-raid-tech-report-considerations-and-best-practices-released

With bigger disks, it's even said that RAID 6 is no longer good enough, due
to large rebuild times in case of a failure.
http://www.zdnet.com/blog/storage/why-raid-6-stops-working-in-2019/805

On Tue, Nov 14, 2017 at 7:41 AM, Ryan Huff <ryanhuff at outlook.com> wrote:

> Reto,
>
> Seek/rpm speeds and media type (flash, sata ... etc) are usually what
> matter the most for RAID disks. If your only difference is total storage
> capacity, the bigger disk will usually work just fine, your just gonna
> waste the additional 154GB of space (because the RAID will only provision
> 146GB of that 300GB disk).
>
> Just remember on a RAID 5, don’t pull/lose more that 1 disk at a time ....
> painful lesson long ago I share over beer every now and then.
>
> -Ryan
>
> On Nov 14, 2017, at 8:23 AM, Reto Gassmann <voip at mrga.ch> wrote:
>
> Hallo
>
> We have a UCS C210 Server with 10x146 GB Disks. One of the Disks failed
> and I got a 300 GB replacement Disk from Cisco.
>
> Is that a problem if I replace the defect 146 Disk in the RAID 5 with a
> 300 GB Disk?
>
> Thanks for help
> Regards Reto
>
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