sony-vaio-z-series team mailing list archive

[Xavier Hallade <xh@xxxxxxxxxxx>]

I don't think a LVM will be more safe as raid0 in this case.
The two or four drives are on the same circuit so I can't see how a single
drive could fail.
If there is a problem on that proprietary ssd, no matter the raid,
everything will be lost.

PS : I will receive my vpc-z today or tomorrow (hdd version that I'll
replace with an x25-m) and I'll try to use debian on it.

2010/3/30 Peter Fern <sonylinux@xxxxxxxxxxx>

> On 30/03/10 17:30, Jan Groth wrote:
> > Talking about RAID 0 - Well, I'n not explicitly aware of a increased
> > data loss risk. My motivation is rather that I need the capacity,
> > because 2x64 GB is not much for a laptop.
>
> Just to re-iterate, any single drive failure will destroy _all_ data on
> all disks in RAID0, so best to either use the individual drives as
> individual volumes (simplest, most portable, probably most sensible), or
> join them into a single LVM volume (more complex, limited benefit,
> certainly more painful to resolve following a failure, but won't lose
> all your data if a single drive fails).
>
> > Furthermore RAID 10 seems to require at least 4 devices, which is
> > something I clearly cannot fulfill...
> > (http://en.wikipedia.org/wiki/RAID#RAID_10)
>
> The OP said he had 4 disks, I just assumed you had the same.
>
> > > and really, with SSDs, do you need that much speed?
> >
> > hey, that's my own point from 1992. Back in these days I started a
> > flamewar with everyone who said that he needed more then 60 MB hard
> > drive capacity. I simply couldn't imagine a usecase where someone
> > would need THAT much capacity :-)
>
> Well, sure, that's all well and good, unless you're making a decision
> about speed vs reliability - IMHO you need to have a a really good
> use-case for running RAID0, ie - I really need X throughput for Y
> application, which I can't get out of single drive or parity RAID
> performance (and understand that all your data may go 'poof!' one day
> when any drive fails, and know that you're OK with that).
>
> Cheers,
> Pete
>
>
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