From owner-freebsd-questions Mon Jan 2 21:47:39 1995 Return-Path: questions-owner Received: (from root@localhost) by freefall.cdrom.com (8.6.9/8.6.6) id VAA10132 for questions-outgoing; Mon, 2 Jan 1995 21:47:39 -0800 Received: from beta.wsl.sinica.edu.tw (beta.wsl.sinica.edu.tw [140.109.7.2]) by freefall.cdrom.com (8.6.9/8.6.6) with SMTP id VAA10126 for ; Mon, 2 Jan 1995 21:47:36 -0800 Message-Id: <199501030547.VAA10126@freefall.cdrom.com> Received: by beta.wsl.sinica.edu.tw (1.37.109.8/16.2) id AA08038; Tue, 3 Jan 1995 13:46:41 +0800 From: Yen-Wei Liu Subject: "super block size 0 " problem To: questions@freebsd.org Date: Tue, 3 Jan 95 13:46:41 EAT Mailer: Elm [revision: 70.85] Sender: questions-owner@freebsd.org Precedence: bulk Hello everyone, Today I am trying to install a modified bootstrap loader and fail. disklabel keeps complaining "Warning, revolutions/minute 0" and "super block size 0". After examing the source of disklabel, I find the "super block size 0" keeps me from writing out boot loader. In addition to super bock size 0, the rpm, interleave, trackskew, cylinderskew,headswitch,track-to-track seek, drive data are all zero. This hard disk is a Quantum 540A 516MB IDE one, installed as 2nd hard disk, from cyclinder 236 to 1048 assigned to FreeBSD. And it works fine so far. I just can't figure out why my super block size could be zero. Any idea ? What if I modify disklabel to write out bootstrap loader no matter how my super block size is zero ? Will this ruin my whole system ? -- Yen-Wei Liu (ywliu@beta.wsl.sinica.edu.tw)