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data as it's writing/reading from the disks in a way that minimizes bad
cables/controllers/disks.  It's worth reading about.  I think Sun has
released the code for ZFS as part of it's OpenSolaris project.

At the risk of being a heritic here :-) Solaris 10 finally gives me reasons
to consider on an x86 server instead of Linux.  Improved speed, ZFS, zones
and dtrace.  They're also releasing source for most of it and hopefully
we'll see some of it appear in Linux.


--
A strong conviction that something must be done is the parent of many bad
measures.
  - Daniel Webster

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<br><br><div><span class=3D"gmail_quote">On 12/9/05, <b class=3D"gmail_send=
ername">Paul Lussier</b> &lt;<a href=3D"mailto:p.lussier at comcast.net">p.lus=
sier at comcast.net</a>&gt; wrote:</span><blockquote class=3D"gmail_quote" sty=
le=3D"border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex;=
 padding-left: 1ex;">
<br>While it's all well and good to claim that backups are still<br>necessa=
ry, or the system should be designed better, yadda, yadda,<br>yadda, the re=
ality is this:<br><br> - the quality of IDE hard drives sucks compared SCSI
<br> - the cost SCSI quality is more than customers will pay<br> - there is=
 big demand for low-cost, disk-based archival systems<br>&nbsp;&nbsp; scali=
ng into the PETA-byte range<br><br>Given that the servers in these clusters=
 are usually 1u, and have 4
<br>drives in them, it's imperitive to maximize the storage space per<br>no=
de.&nbsp;&nbsp;Going to scsi automatically increases your cost ridiculously=
,<br>but more importantly, simultaneously descreases your maximum capacity<=
br>per node.
<br><br>So, mod's request for something which &quot;scrubs&quot; disks in t=
he background<br>and re-maps bad blocks on the fly, IMO, is not only a legi=
timate<br>request, but something sorely needed in the Linux space.</blockqu=
ote>
<div><br><br>From what I've been reading, Sun's ZFS does this.&nbsp; It doe=
s error checking of data as it's writing/reading from the disks in a way th=
at minimizes bad cables/controllers/disks.&nbsp; It's worth reading about.&=
nbsp; I think Sun has released the code for ZFS as part of it's OpenSolaris=
 project.
<br><br>At the risk of being a heritic here :-) Solaris 10 finally gives me=
 reasons to consider on an x86 server instead of Linux.&nbsp; Improved spee=
d, ZFS, zones and dtrace.&nbsp; They're also releasing source for most of i=
t and hopefully we'll see some of it appear in Linux.
<br></div><br></div><br>-- <br>A strong conviction that something must be d=
one is the parent of many bad measures.<br>&nbsp;&nbsp;- Daniel Webster

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