[ML-General] hardware RAID

[Brian Oborn]

I swear by Linux software RAID. At my previous job we had some problems
with hardware RAID controllers, so I started using the software RAID and
never looked back. Remember that you also have to plan for recovery if the
controller bites the dust, whereas with software RAID you can use any other
linux machine. Finally, if you possibly can run RAID10 instead of RAID5/6
(or LVM and bunch of RAID1 pairs). You'll get much better performance and
resiliency, especially with small reads and writes.

Brian Oborn (bobbytables)

On Thu, Jun 11, 2015 at 4:16 PM, Joshua Pritt <ramgarden at gmail.com> wrote:

> I've had good experience with my Promise RAID controller and Promise 4
> drive enclosure.
>
> Enclosure:
>
> http://www.bhphotovideo.com/c/product/802836-REG/Promise_Technology_SUPERSWAP_4600_BEIGE_Internal_SuperSwap_4600_SAS_SATA.html
>
> Controller:
>
> http://www.ebay.com/itm/Promise-FastTrak-S150-SX-4-SATA-RAID-5-Controller-Card-256MB/261817055986?_trksid=p2141725.c100338.m3726&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%26asc%3D20141212152715%26meid%3D806b1dd81ce74c518c631a78f60414f7%26pid%3D100338%26rk%3D13%26rkt%3D28%26sd%3D271894688538
>
> I have four 250 GB drives in there now for 750 GB but I've had those in
> there for many years.  I've already had one drive fail over the years and
> easily hot swapped it for another 250 GB drive and it brought it all back
> up without stopping the computer at all (just like it's meant to!)
>
> Of course if I had to start over I'd just get a Drobo so I could throw any
> size hard drives at it:
> https://www.youtube.com/watch?v=6VGR8JAij0s
>
> http://www.drobo.com/
>
>
>
>
> On Thu, Jun 11, 2015 at 5:06 PM, david <ainut at knology.net> wrote:
>
>> I haven't kept up.  What do you guys recommend for SATA internal raid
>> controllers?
>> I have a stack of 3 in striped (raid 0?) and a stack of 2 in raid 5.
>> Both sets were configured to use software raid under Linux but the raid 5
>> did not turn out to really be mirrored drives.  Bah.
>> I'm hoping that the 3 striped disks can be converted to the hardware
>> controller without problems (6 terabyte.)
>> The set of 2 that *should* be identical, can be made identical with dd,
>> if I must before attaching them to the hardware controller.
>>
>> So, advice?
>>
>> Thanks,
>> David Merchant
>>
>>
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>>
>
>
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