From owner-freebsd-scsi Tue Mar 5 21: 7:18 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from magic.adaptec.com (magic.adaptec.com [208.236.45.80]) by hub.freebsd.org (Postfix) with ESMTP id 8D3DF37B405 for ; Tue, 5 Mar 2002 21:07:10 -0800 (PST) Received: from redfish.adaptec.com (redfish.adaptec.com [162.62.50.11]) by magic.adaptec.com (8.10.2+Sun/8.10.2) with ESMTP id g2656Sj01368; Tue, 5 Mar 2002 21:06:28 -0800 (PST) Received: from btc.btc.adaptec.com (btc.btc.adaptec.com [162.62.64.10]) by redfish.adaptec.com (8.8.8+Sun/8.8.8) with ESMTP id UAA15022; Tue, 5 Mar 2002 20:48:48 -0800 (PST) Received: from btcexc01.btc.adaptec.com (btcexc01 [162.62.147.10]) by btc.btc.adaptec.com (8.8.8+Sun/8.8.8) with ESMTP id WAA18733; Tue, 5 Mar 2002 22:06:23 -0700 (MST) Received: by btcexc01.btc.adaptec.com with Internet Mail Service (5.5.2653.19) id <1TZTW2SC>; Tue, 5 Mar 2002 22:06:25 -0700 Message-ID: From: "Long, Scott" To: "'Patrick Thomas'" , Tom Samplonius Cc: freebsd-scsi@freebsd.org Subject: RE: Dell PERC scrub / scrubbing question Date: Tue, 5 Mar 2002 22:06:24 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: text/plain Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Specifically, what kind of controller is this? There were several sub-models of the Dell PERC2. Tom is correct, a scrub is when all blocks on a redundant array (0, 5, 10, 50, etc) are read and the mirror/parity data is recalculated and written. On some controllers, the array can be used while the scrub is in progress, but this slows down both the scrub operation and the I/O to the array. If the scrub completes but then starts again after a reboot it could be either a bug in the firmware on the card, or that the card may not be getting shut down correctly and the firmware is starting a scrub to verify that no data was lost. Please send me your dmesg output so I can determine if I can help you with some specific debugging procedures. Scott > -----Original Message----- > From: Patrick Thomas [mailto:root@utility.clubscholarship.com] > Sent: Tuesday, March 05, 2002 12:13 AM > To: Tom Samplonius > Cc: freebsd-scsi@freebsd.org > Subject: Re: Dell PERC scrub / scrubbing question > > > > These are mirrors I have created, though...RAID 1. Comments > ? (please :) > > --PT > > > > > When I created my mirrors originally with my Dell PERC 2 > controller, they > > > immediately started scrubbing. The BIOS told me not to > use them until > > > they were done scrubbing. Fair enough. > > > > Depends on what they mean by scrubbing. It usually takes > a long time to > > initialize a RAID5 volume, because the parity is created > for the first > > time. > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-scsi" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message