From: Michael Evans <mjevans1983@gmail.com>
To: Mikael Abrahamsson <swmike@swm.pp.se>
Cc: Michael Tokarev <mjt@tls.msk.ru>,
Bill Davidsen <davidsen@tmr.com>,
Kaushal Shriyan <kaushalshriyan@gmail.com>,
linux-raid@vger.kernel.org
Subject: Re: RAID5
Date: Fri, 23 Apr 2010 20:34:02 -0700 [thread overview]
Message-ID: <k2i4877c76c1004232034m5c3f79b0s827a92e9349fa7a2@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.1.10.1004240340510.6768@uplift.swm.pp.se>
On Fri, Apr 23, 2010 at 6:47 PM, Mikael Abrahamsson <swmike@swm.pp.se> wrote:
> On Fri, 23 Apr 2010, Michael Evans wrote:
>
>> devices, but now everyone is selling SDDs which are broken for such
>> needs. Any ram drive units still being sold seem to be more along
>> data-center grade sizes.
>
> http://benchmarkreviews.com/index.php?option=com_content&task=view&id=308&Itemid=60
>
> Basically it's DRAM with a battery backup and a CF slot where the data goes
> in case of poewr failure. It's a bit big and so on, but it should be perfect
> for journals... Or is this the kind of device you were referring to as "data
> center grade size"?
>
> Some of te SSDs sold today have a capacitor for power failure as well, so
> all writes will complete, but they're not so common.
>
> --
> Mikael Abrahamsson email: swmike@swm.pp.se
>
Yeah, that's in the range I call 'data center grade' since the least
expensive model I can find using search tools is about 236 USD. For
that price I could /buy/ two to three hard drives and get nearly the
same effect by reusing old drives (but wasting more power).
I should be able to find something with a cheep plastic shell for
mounting and a very simple PCB that has slots for older ram of my
selection, and a minimal onboard CPU for less than 50USD; I seriously
doubt the components cost that much.
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next prev parent reply other threads:[~2010-04-24 3:34 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-04-19 3:46 RAID5 Kaushal Shriyan
2010-04-19 4:21 ` RAID5 Michael Evans
2010-04-21 13:32 ` RAID5 Bill Davidsen
2010-04-21 19:43 ` RAID5 Michael Evans
2010-04-23 14:26 ` RAID5 Michael Tokarev
2010-04-23 14:57 ` RAID5 MRK
2010-04-23 20:57 ` RAID5 Michael Evans
2010-04-24 1:47 ` RAID5 Mikael Abrahamsson
2010-04-24 3:34 ` Michael Evans [this message]
2010-05-02 22:51 ` RAID5 Bill Davidsen
2010-05-03 5:51 ` RAID5 Luca Berra
2010-05-02 22:45 ` RAID5 Bill Davidsen
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