[mythtv-users] warning for anyone with western digital green drives

John Drescher drescherjm at gmail.com
Wed Feb 15 17:29:21 UTC 2012


On Wed, Feb 15, 2012 at 12:21 PM, Gary Buhrmaster
<gary.buhrmaster at gmail.com> wrote:
> On Wed, Feb 15, 2012 at 08:25, PJR <pjrobinson at metronet.co.uk> wrote:
>> Agreed, yes I should refine what I meant by 'ok for RAID'.
>> Firstly I'll be using s/w RAID and yes if in order to configure the
>> drives for RAID then:
>>
>> * ability to shorten retry timers
>> * ability to disable idle timers
>> * error rates (unrecoverable/recoverable)
>
> "Consumer" drives that support persistent TLER/ERC/CCTL
> are not common.  There are discussions at the following
> sites (extracted from one of the last posts to the first
> link) regarding which drives support these.
>
>
> HardForum: http://hardforum.com/showthread.php?t=1590200
> StorageForum: http://forums.storagereview.com/index.php/topic/28333-tler-cctl/
> Habrahabr (Russian blog?):
> http://translate.google.com/translate?sl=auto&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fhabrahabr.ru%2Fblogs%2Fhardware%2F92701%2F
>

The one good thing about this is mdadm seems to be able to cope with
this for the most part. For the 100+ hard drives I have here at work
in linux software raid 6 none of them have TLER/ERC/CCTL enabled. And
they do die. I send back my share of RMAs. Over the 200+ drives we
have spinning 24/7/365 I send back 10 to 20 each of the last 4 years.
Since drive RMAs have drastically increased over this period I have
moved most of my arrays to use hot swappable bays to make the job of
swapping out drives without having to power down the system safer.
When I was not using hot swap bays the big concern was the power cable
of a nearby drive could come out while physically trying to remove a
bad disk.

John
John


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