Re: Postgresql data integrity during RAID10 drive rebuild - Mailing list pgsql-general

From Vivek Khera
Subject Re: Postgresql data integrity during RAID10 drive rebuild
Date
Msg-id 712021D9-6D5E-4F38-B21E-D850B125C543@khera.org
Whole thread Raw
In response to Re: Postgresql data integrity during RAID10 drive rebuild  (Scott Marlowe <smarlowe@g2switchworks.com>)
Responses Re: Postgresql data integrity during RAID10 drive rebuild  (Scott Marlowe <smarlowe@g2switchworks.com>)
List pgsql-general
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.


Attachment

pgsql-general by date:

Previous
From: Martijn van Oosterhout
Date:
Subject: Re: coalesce with all nulls can only be assigned to
Next
From: Mark Jensen
Date:
Subject: Re: How to implement backup protocol