Date: Mon, 22 Oct 2001 14:23:17 -0400 (EDT)
From: Robert Watson <rwatson@FreeBSD.org>
To: current@FreeBSD.org
Subject: One or more if {disklabel,mdconfig,newfs} broken for small , file-backed md file systems.
Message-ID: <Pine.NEB.3.96L.1011022141433.7549B-100000@fledge.watson.org>
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For small devices (unclear definition of small), the following (changed from swap to vnode from the mdconfig man page example) is broken: sproing# dd if=/dev/zero of=foo bs=1024000 count=1 1+0 records in 1+0 records out 1024000 bytes transferred in 0.234674 secs (4363498 bytes/sec) sproing# mdconfig -a -t vnode -f foo md0 sproing# disklabel -r -w md0 auto sproing# newfs /dev/md0c cylinder groups must have at least 2 cylinders sproing# disklabel -r md0 # /dev/md0c: type: unknown disk: amnesiac label: flags: bytes/sector: 512 sectors/track: 63 tracks/cylinder: 1 sectors/cylinder: 63 cylinders: 31 sectors/unit: 2000 rpm: 3600 interleave: 1 trackskew: 0 cylinderskew: 0 headswitch: 0 # milliseconds track-to-track seek: 0 # milliseconds drivedata: 0 8 partitions: # size offset fstype [fsize bsize bps/cpg] c: 2000 0 unused 0 0 # (Cyl. 0 - 31*) "large" devices (such as 128mb) work fine. It's not clear to me what the actual breakage is here, since my knowledge of the FFS/device stuff is weak; however, it would be nice to be able to do what I'm trying to do. :-) Robert N M Watson FreeBSD Core Team, TrustedBSD Project robert@fledge.watson.org NAI Labs, Safeport Network Services To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message
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