Re: Postgresql data integrity during RAID10 drive rebuild

From: Vivek Khera <vivek(at)khera(dot)org>
To: pgsql general <pgsql-general(at)postgresql(dot)org>
Subject: Re: Postgresql data integrity during RAID10 drive rebuild
Date: 2006-11-29 20:16:41
Message-ID: 712021D9-6D5E-4F38-B21E-D850B125C543@khera.org
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On Nov 29, 2006, at 2:39 PM, Scott Marlowe wrote:

>> Sounds good. According to LSI, the drive will take 8 hrs to rebuild a
>> 146GB disc (at a 30% rebuild rate), so doing this in the middle of
>> the
>> day is not ideal.
>
> The rebuild time also tends to depend on how full the array is. If
> you're only using 5% or so, it won't take the full 8 hours they're
> projecting.

But how does the RAID card know what is and what is not "full" in the
unix file system stored on it? It has to rebuild the entire drive.

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