[Leica] Drive question.

[Spencer Cheng]

It’s risky to rely on RAID-5 for HDDs over 1TB or so. The probability of a soft error during RAID-5 rebuild (which takes a long time for large HDDs) after a disk failure is statically significant for larger HDDs. Most RAID system will abort the RAID rebuild if an (soft) error occur (and then you have to recover from your backups — you do have backups, right? :) 

I’ve gone to RAID-1 for my own personal NAS at home (and I use ZFS to ensure data integrity for you geeks). I only get 50% utilization but at least I can be sure that at least one copy will be usable after an HDD failure. I’ve had at least 1 HDD fail and 2 HDD go flakey on me over the last year or 2. Always just past the end of the warranty period.

My back up media is a single external HDD that is big enough to hold a copy of everything on my NAS. It’s a bit cumbersome but I don’t have the budget for a robotic tape library. :-( 

Regards,
Spencer

> On Nov 14, 2016, at 0:26, Jayanand Govindaraj <jayanand at gmail.com> wrote:
> 
> So do I. 4TB x4 in a Synology NAS in Raid 5 array. Gives around 11TB of
> usable space.
> Cheers
> Jayanand
> 
> 
> On Mon, Nov 14, 2016 at 12:03 AM, John McMaster <john at mcmaster.fr> wrote:
> 
>> I have Western Digital Red Pro drives in all mine
>> https://www.wdc.com/products/business-internal-storage/wd-red-pro.html
>> 
>> john
>> 
>> -----Original Message-----
>> 
>> Any opinions out there as to a good drive for a NAS enclosure?
>> 
>> Leo Wesson
>> leowesson.com
>> 
>> 
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>> 
> 
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