[OpenIndiana-discuss] Expanding storage with JBOD

[Saso Kiselkov]

On 1/3/14, 3:14 PM, Roman Naumenko wrote:
> ----- Original Message -----
>> On 1/3/14, 12:13 PM, Roman Naumenko wrote:
>>> Saso Kiselkov said the following, on 03-01-14 5:47 AM:
>>>> So you'd rather pay $650 instead of $400 for the exact same 10TB
>>>> instead? (i.e. 10x1TB ($65) vs. 5x2TB ($80)) Why are you so
>>>> heavily
>>>> focused on the number of spindles vs capacity?
>>> Well, theoretically if 1TB works I don't see the reason why 2TB
>>> wouldn't.
>> Because they're much more expensive on a $/GB basis than equivalent
>> 3.5'' drives (and much slower). Also, you can get 4TB 3.5'' drives
>> today, whereas 2.5'' maxes out at half that.
> 
> Yeah, right. msa50 won't be as much efficient as enclosure with 3.5 disks. 
> There are MSA with 3.5, but they are even less suitable for home and not so cheap. 
> 
>>>> Also, the IcyBox I recommended to you is a tiny thing you can run
>>>> on
>>>> your desk or stick underneath a staircase out of sight. The MSA50,
>>>> on
>>>> the other hand, is a huge rack-mounted hunk of loud fans. Not
>>>> least of
>>>> all it's gonna cost you a lot more over time if you factor in
>>>> electricity costs (http://dft.ba/-7EzE).
>>> Power is 200W, I can live with that.
>>
>> 200W running for 8760 hours (1 year) comes to around $200 (at
>> $0.12/kWh). That IcyBox consumes less than 1/4 of that, so if you're
>> examining your finances so carefully, factor in an extra $300 over 2
>> years you'll spend on the MSA50.
>>
>>>> I just don't get this obsession of yours with datacenter-grade
>>>> hardware.
>>> Expandable and works.
>> And a small box with a power supply and pass-through connectors
>> somehow
>> doesn't work? You know you can get SFF-8088 to individual SATA/SAS
>> fanout cables, right? And once you stuff the HP MSA50 full of 1TB
>> hard
>> drives, it's not expandable anymore. And if you're going to be
>> replacing
>> hard drives in the MSA50, you can do the same in the IcyBox.
>>
>>> Nothing with SFF-8088 comes even close with the
>>> price (plus all those brand-new jbods in the price range 1000-2000
>>> - is
>>> utterly junk).
>> This is used outdated 3G SAS kit you're showing, so it's pretty clear
>> it'd be much cheaper.
>>
>> Overall I think you're trying to save money on entirely the wrong
>> things. Get a few good high-capacity disks and a low-power enclosure
>> and don't worry about buying a SAS HBA (or if you do, buy one which
>> doesn't limit you to 2TB per drive).
> 
> Ok, lets run the numbers for icybox
> http://www.raidsonic.de/data/datasheet/raidon/EN/datasheet_iS2880_e.pdf
> I'll probably need this model, iS2880-8S-U5D - 245$ on amazon.

What do 8x 2.5'' spindles give you that 5x 3.5'' don't? Do you need the
extra performance?

-- 
Saso