[illumos-Developer] Changing sd_io_time to 8?

[Joerg Schilling]

Richard Elling <richard.elling at richardelling.com> wrote:

> > A hard-disk that is just booting after a power on or reset and that has read 
> > problems in one of the copies for the firmware sectors or in one of the copies
> > for the defect list sectors may take a _long_ time too to recover and it is of 
> > course worth to wait at least a minute in such a case.
> > 
> > If you really like to speed things up, start thinking about a way to reduce the 
> > number of driver level _retries_ in case of problems if the related disk is 
> > part of a RAID-Z2 and the dataa could be recovered otherwise.
>
> More retries, shorter timeouts, fewer resets is the goal.

Timeouts cause resets, so shorter timeouts cause more resets.
More retries cause longer hangs.

Jörg

-- 
 EMail:joerg at schily.isdn.cs.tu-berlin.de (home) Jörg Schilling D-13353 Berlin
       js at cs.tu-berlin.de                (uni)  
       joerg.schilling at fokus.fraunhofer.de (work) Blog: http://schily.blogspot.com/
 URL:  http://cdrecord.berlios.de/private/ ftp://ftp.berlios.de/pub/schily