From owner-freebsd-questions Tue Sep 11 20:24:31 2001 Delivered-To: freebsd-questions@freebsd.org Received: from hotmail.com (oe21.law7.hotmail.com [216.33.236.125]) by hub.freebsd.org (Postfix) with ESMTP id DCBBD37B408 for ; Tue, 11 Sep 2001 20:24:27 -0700 (PDT) Received: from mail pickup service by hotmail.com with Microsoft SMTPSVC; Tue, 11 Sep 2001 20:24:27 -0700 X-Originating-IP: [64.34.181.113] From: "Michael" To: Subject: Newfs Super Block Backups?? Date: Tue, 11 Sep 2001 20:27:29 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C13B00.2DBFAE20" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.00.2919.6700 X-MimeOLE: Produced By Microsoft MimeOLE V5.00.2919.6700 Message-ID: X-OriginalArrivalTime: 12 Sep 2001 03:24:27.0883 (UTC) FILETIME=[6DC4A3B0:01C13B3A] Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C13B00.2DBFAE20 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On a 4.3 stable system I'm doing a newfs -b 8192 -f 1024 /dev/ar0s1e, = with ar0 being a RAID 0 array of two 60GB disks attached to a Highpoint = controller, all properly recognized according to dmesg. It seems to be doing the job but while doing it, it spits out a huge = list of sectors so that the whole thing looks like this: #newfs -b 8192 -f 1024 /dev/ar0s1e Warning: 2008 sector(s) in last cylinder unallocated. /dev/ar0s1e: 240203816 sectors in 58644 cylinders of 1 tracks, 4096 = sectors, 117287.0MB in 3666 cyl groups (16 c/g, 32.00MB/g, 7936 i/g) super-block backups (for fsck -b #) at=20 32, 65568, 131104, 196640, 262176, 327712, 393248, 458784, 524320, = 589856, .... [pages more] ..., 240189472 I can mount the file system and should be happy but my inquisitive mind = would like to know what all this stuff about the super-block backup = means, I could not find any documentation on it. Thanks for any enlightenment. ------=_NextPart_000_0005_01C13B00.2DBFAE20 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
On a 4.3 stable system I'm doing a = newfs -b 8192 -f=20 1024 /dev/ar0s1e, with ar0 being a RAID 0 array of two 60GB disks = attached to a=20 Highpoint controller, all properly recognized according to = dmesg.
 
It seems to be doing the job but while = doing it, it=20 spits out a huge list of sectors so that the whole thing looks like=20 this:
 
#newfs -b 8192 -f 1024 = /dev/ar0s1e
Warning: 2008 sector(s) in last = cylinder=20 unallocated.
/dev/ar0s1e: 240203816 sectors in 58644 = cylinders=20 of 1 tracks, 4096 sectors, 117287.0MB in 3666 cyl groups (16 c/g, = 32.00MB/g,=20 7936 i/g)
super-block backups (for fsck -b #) at=20
32, 65568, 131104, 196640, 262176, = 327712, 393248,=20 458784, 524320, 589856,
....
[pages more]
..., 240189472
 
 
I can mount the file system and should = be happy but=20 my inquisitive mind would like to know what all this stuff about the = super-block=20 backup means, I could not find any documentation on it.
 
Thanks for any=20 enlightenment.
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