OT: Dell disks

[Carruth, Rusty]

Disclaimer time:  I work for an SSD manufacturer.  We sell high-end 'enterprise' SSDs.

However, while some of what I say is based upon my experience there, NONE of it is official, and all of it is my personal opinion.  Just remember what you paid for it! ;-)

There are at least 2 levels of 'SSD' - enterprise and consumer.  Contrary to what was said about rotating drives and that weird 'error fast' thing, in SSD-land there is a large difference between 'enterprise' and 'consumer'.  Enterprise drives are designed to run at very near full rated TPS and/or MB/S continuously 24x7x365.  Consumer drives won't last anywhere near that.  (Consumer drives are often implemented using the same technlogy (and expected lifetime) that is used in memory sticks.  If that doesn't scare you to death nothing will :-))

In any case, I'd look at the smart attributes.  Use smartctl -a and see if anything is nearing the threshold.  Send the output to me personally if you want me to look at it, I'll be happy to.  (As long as I don't get 2,000 of those tomorrow, anyway! ;-)

And some other day I'll say what I think of RAID 5 :-)

Rusty

-----Original Message-----
From: plug-discuss-bounces at lists.plug.phoenix.az.us on behalf of Michael Butash
Sent: Tue 6/19/2012 9:13 PM
To: plug-discuss at lists.plug.phoenix.az.us
Subject: Re: OT: Dell disks
 
On 06/19/2012 12:48 PM, Eric Shubert wrote:
> On 06/19/2012 06:28 AM, Lisa Kachold wrote:
>> Hi Mark,
>>...
> I'll continue to steer clear of HW raid, as well as raid-5. :)
>

So yeah, no raid is perfect...

....

To its testament, it rebooted, both disks reported healthy (hdparm, 
ubuntu disk utility), I re-added each partition, let it rebuild, and 
works again.  Still worries me as my last set of ssd disks got unstable 
on one after less than 9 months of use and I'm probably about there with 
these that are known to get cranky.  Smart reports them as ok, so I 
wonder how bad ati taints the kernel space that it causes disk 
controller/driver exceptions.

Moral of story: know when/how to repair whatever raid, as software and 
hardware are seemingly still prone to exception from unlikely places. 
Last time a disk died with md, I just mounted the secondary in an 
enclosure, copied off data as pluggable, and copied to the new pair of 
raid disks.  Hardware is never this easy, especially fakeraids.

-mb
---------------------------------------------------
PLUG-discuss mailing list - PLUG-discuss at lists.plug.phoenix.az.us
To subscribe, unsubscribe, or to change your mail settings:
http://lists.PLUG.phoenix.az.us/mailman/listinfo/plug-discuss

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.PLUG.phoenix.az.us/pipermail/plug-discuss/attachments/20120619/a2c74dce/attachment.html>