[ale] backup/restore mail from USB external drive

[John Heim]

It happened to me twice in the past 7 months on the same server. Two 
disk failed w/i 48 hours of each other twice.

PS: In the past year, I've also had the HD controllers fail on both of 
our front end mail servers on the same day. And one time a fan in the 
server room flew apart and one of the blades cut the power line to the 
server rack.

On 02/13/14 07:18, Lightner, Jeff wrote:
> RAID5 having 2 failures is not theory - it happens and the larger the drives the longer it takes to rebuild increasing the risk.  I've seen such failures on more than one occasion.
>
> I've yet to see 3 disks fail before a rebuild completes in either a RAID6 or RAID10 setup.   I agree that RAID10 if available is much better from a performance standpoint.
>
> We have several RAID6 sets with 2 TB SATA drives in our Hitachi array and the rebuild time for such drives is several hours which is why they're in RAID6.   The performance is good because the array itself has significant amount of cache.
>
> Jeffrey C. Lightner
> Sr. UNIX Administrator
>
> DS Waters of America, Inc.
> 5660 New Northside Drive NW
> Suite 250
> Atlanta, GA  30328
>
> P: 678-486-3516
> C: 678-772-0018
> F: 678-460-3603
> E: jlightner at water.com
>
>
>
>
>
> -----Original Message-----
> From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of JD
> Sent: Thursday, February 13, 2014 4:57 AM
> To: ale at ale.org
> Subject: Re: [ale] backup/restore mail from USB external drive
>
> On 02/12/2014 11:09 PM, Jim Kinney wrote:
>> I've been getting 4TB SAS2 drives for <$430
> Picked up a 4TB Hitachi SATA for $160 last week. 3 yr warranty.
> I'm hoping this is a batch from before WD screws up their quality. ;) _______________________________________________
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-- 
John Heim
email: john at johnheim.com  skype: john.g.heim