From: Tomasz Torcz <tomek@crocom.com.pl>
To: linux-btrfs@vger.kernel.org
Subject: Re: single disk reed solomon codes
Date: Mon, 21 Jul 2008 08:48:43 +0200 [thread overview]
Message-ID: <1216622923.6970.19.camel@s1.crocom.com.pl> (raw)
In-Reply-To: <0cb201c8e9b2$a4272b20$0a00a8c0@ALDI2>
Dnia 2008-07-19, sob o godzinie 17:18 +0200, Gerald Nowitzky pisze:
> In the end, you would add very little security by the price of -at least-
> cutting half your write performance. Thus, I don't think there is any point
> in adding redundancy to single disk systems.
ZFS can store multiple copies of data block within one disk. Using
your words, it's like "Intra-Disk-RAID1". After reading data, when
checksum shows it's corrupted, another copy (hopefully correct) is read
from other disk location.
This is adding security by the price of half storage capacity. Which
seems like a fair game, given todays 1,5TB HDDs.
--
Tomasz Torcz
next prev parent reply other threads:[~2008-07-21 6:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-19 12:21 single disk reed solomon codes Ahmed Kamal
2008-07-19 15:18 ` Gerald Nowitzky
2008-07-19 22:15 ` Joe Peterson
2008-07-20 1:21 ` Bron Gondwana
2008-07-21 6:48 ` Tomasz Torcz [this message]
2008-07-21 7:40 ` Ahmed Kamal
2008-07-21 13:03 ` Chris Mason
2008-07-21 15:03 ` Dongjun Shin
2008-08-04 6:52 ` Ahmed Kamal
2008-08-04 11:31 ` Ric Wheeler
2008-07-19 16:50 ` David Woodhouse
2008-07-19 16:53 ` Ahmed Kamal
2008-07-21 13:05 ` Chris Mason
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