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Re: external drive enclosures / esata / port multipliers?

On Tue, 18 Jan 2011, Monte Milanuk wrote:
> On 1/17/11 5:57 PM, Henrique de Moraes Holschuh wrote:
> >On Mon, 17 Jan 2011, Monte Milanuk wrote:
> >>My big question is... most of these external drive boxes seem to
> >>claim support for JBOD, RAID 0, 1, 10, 5, etc. - should I presume
> >>that is simply fake RAID like many commodity mobos have, and not
> >
> >Either that, or worse: data-eating crap like many low-cost PCI-SATA host
> >bridges (such as some of the sil3xxx chips).
> Interesting... any particular examples?  It seems that a lot of the
> SATA external drive enclosures I was looking at come with an eSATA
> card using a sil3xxx chipset, but no mention of data corruption in
> the user reviews, FWIW.

No, look in bugzilla.kernel.org, and assorted reports in LKML... not all
SIL chips are broken.

> In other words '...avoid anything except the most expensive
> enterprise-grade equipment for a home backup storage solution'

Nah.  But be warned you have a 50% chance of getting crap, and plan
accordingly to try to avoid the trap.

And "most expensive enterprise-grade equipment" doesn't describe a small
SAS jbod enclosure and a SAS HBA.  You can probably get both for well
below US$ 1k, and you can populate it with SATA disks just fine.

  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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