Date: Mon, 08 Jun 1998 11:08:27 +0200 (CEST) From: Malte Lance <malte@webmore.com> To: Robert Chalmers <robert@chalmers.com.au> Cc: freebsd-questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Disktab and Disklabel curiosities. One works, one doesn't! Message-ID: <XFMail.980608110827.malte@webmore.com> In-Reply-To: <357BA9F7.101FAEDC@chalmers.com.au>
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>> > c2490a|Compaq C2490A SCSI:\ >> > :dt=SCSI:ty=winchester:se#512:nt#51:ns#16:nc#5036:sf:\ As far as i know you don't need/want "sf" with SCSI-disks. Malte. On 08-Jun-98 Robert Chalmers wrote: > Thank you very much for that. > > This means that some part of the label process is rounding up. Because the > 4110000 is what is returned by the first part of the disklable process, as > does > disklable xxxx auto. > > I suspected that this may have been the case. > > Thanks for your assistance > > Robert > > Malte Lance wrote: >> >> (referring to the 4 mails you pumped into questions) >> >> > bytes/sector: 512 >> > sectors/track: 16 >> > tracks/cylinder: 51 >> > cylinders: 5036 >> >> total number of sectors: >> sectors/track * tracks/cylinder * cylinders = 16 * 51 * 5036 = 4109376 >> >> > sectors/unit: 4110000 >> >> Here's your mismatch. >> >> > c2490a|Compaq C2490A SCSI:\ >> > :dt=SCSI:ty=winchester:se#512:nt#51:ns#16:nc#5036:sf:\ >> > :pc#4110000:oc#0:te=unused:\ >> > :pe#2055000:oe#0:te=4.2BSD:be#4096:fe#512:\ >> > :pf#2055000:of#2055000:te=4.2BSD:be#4096:ff#512: >> >> 4109376 < pe + pf = 4110000 >> >> Malte. >> >> On 08-Jun-98 Robert Chalmers wrote: >> > Getting closer: >> > >> > by doing the following; >> > >> > dd if=/dev/zero of=/dev/rsd1 bs=1k count=1 >> > disklabel -Brw sd1 auto >> > >> > I managed to create a label c on the scsi drive. disklabel sd1 produced >> > this, >> > minus the a and b partitions; >> ># /dev/rsd1c: >> > type: SCSI >> > disk: sd1s1 >> > label: >> > flags: >> > bytes/sector: 512 >> > sectors/track: 16 >> > tracks/cylinder: 51 >> > sectors/cylinder: 816 >> > cylinders: 5036 >> > sectors/unit: 4110000 >> > rpm: 3600 >> > interleave: 1 >> > trackskew: 0 >> > cylinderskew: 0 >> > headswitch: 0 # milliseconds >> > track-to-track seek: 0 # milliseconds >> > drivedata: 0 >> > >> > 3 partitions: >> ># size offset fstype [fsize bsize bps/cpg] >> > a: 2055000 0 unused 0 0 # (Cyl. 0 >> > - >> 2518*) >> > b: 2055000 2055000 unused 0 0 # (Cyl. >> > 2518*- >> 5036*) >> > c: 4110000 0 unused 0 0 # (Cyl. 0 >> > - >> 5036*) >> > >> > >> > Not finished yet, I then did a disklabel -e -r sd1 >> > >> > and added the a: and b: partitions. exactly as you see them above. Upon >> > quitting the eidtor, it all wrote to disk perfectly!!! I discovered of >> > course >> > that you cant start with c: e: f:... durrr. >> > >> > Now the tricky bit. Do the same with the /etc/disktab entry: >> > I used this disktab entry. >> > >> > c2490a|Compaq C2490A SCSI:\ >> > :ty=winchester:dt=SCSI:ns#16:nt#51:nc#5036:sf:\ >> > :oa#0:pa#2055000:ba#8192:fc#1024:\ >> > :ob#2055000:pb#2055000:bb#8192:fc#1024:\ >> > :oc#0:pc#4110000:bc#8192:fc#1024: >> > >> > doing a disklabel -w -r /dev/rsd1c c2490a sd1s1 produces the two errors, >> > partition b: partition extends past end of unit >> > partition c: partition extends past end of unit >> > >> > What gives. One type of enty works, one doesn't. >> > >> > any ideas anyone? >> > >> > thanks >> > Bob >> > >> > >> > >> > -- >> > Support Whirled Peas. Business in China? China House >> > robert@chalmers.com.au ph:61 7 49440357 fx:61 7 49578425 >> > China House Uses Webposition to ensure Top Spot in Searches >> > http://www.chalmers.com.au/ChinaHouse/Business/webposition >> > >> > To Unsubscribe: send mail to majordomo@FreeBSD.org >> > with "unsubscribe freebsd-questions" in the body of the message >> >> ---------------------------------- >> E-Mail: Malte Lance <malte@webmore.com> >> Date: 08-Jun-98 >> Time: 10:11:20 >> ---------------------------------- > > -- > Support Whirled Peas. Business in China? China House > robert@chalmers.com.au ph:61 7 49440357 fx:61 7 49578425 > China House Uses Webposition to ensure Top Spot in Searches > http://www.chalmers.com.au/ChinaHouse/Business/webposition > ---------------------------------- E-Mail: Malte Lance <malte@webmore.com> Date: 08-Jun-98 Time: 11:05:54 ---------------------------------- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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