From mboxrd@z Thu Jan 1 00:00:00 1970 From: Fabien Salvi Subject: Re: [FEATURE REQUEST] megaraid2 driver Date: Thu, 22 Apr 2004 12:11:18 +0200 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <40879A46.4090603@cri74.org> References: <0E3FA95632D6D047BA649F95DAB60E57033BC510@exa-atlanta.se.lsil.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from aravis.cur-archamps.fr ([195.202.0.99]:41917 "EHLO aravis.cur-archamps.fr") by vger.kernel.org with ESMTP id S263893AbUDVKLT (ORCPT ); Thu, 22 Apr 2004 06:11:19 -0400 In-Reply-To: List-Id: linux-scsi@vger.kernel.org To: Lester Hightower Cc: "'linux-scsi@vger.kernel.org'" Lester Hightower a =E9crit : > Atul / readers of linux-scsi, > [...] > Yesterday we ran a test where we pulled a drive from a logical drive = set > that had a hot spare. The MegaRaid card rebuilt automatically, and a= fter > we inserted a fresh disk it automatically marked as a hot spare. Tha= t > went well, however, it took almost two hours to rebuild 73G on u320 d= isks > in raid-1, which surprised me since the Mylex Acceleraid 170 (u160) t= ook > less than an hour in the same test. =20 Well, not very surprising. Speed can vary from one manufacturer to anot= her. It also depends of the priority given to this task... > One thing the DAC960 driver does is publish the real-time progress of= a > rebuild operation, both in /proc and by klog every few minutes. The = Linux > MegaRaid driver is completely silent start to finish, only showing th= at it > is in a Rebuild state. Because the DAC960 card had already given us = an > idea of how much time to expect the rebuild to take, the second hour = that > the MegaRaid consumed was unnerving, and primarily due to the fact th= at we > had no rebuild progress indication available to us. It's not the driver's job to display this... > I searched through all of the structs in megariad2.h and do not readi= ly > see any data available that would indicate the progress of a rebuild,= else > I would code this myself and submit a patch. Instead I am asking Atu= l, > and anyone else with expertise in this area, for assistance or advice= in > implementing that feature. You should look at userland utilities to manager your RAID controller. I've not tested them with megaraid2 driver, but you should look at=20 LSILogic support web site to get utilities (GAM, Megamgr, etc...). --=20 =46abien SALVI - To unsubscribe from this list: send the line "unsubscribe linux-scsi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html