Date: Mon, 08 Jun 1998 19:08:07 +1000 From: Robert Chalmers <robert@chalmers.com.au> To: malte@webmore.com Cc: freebsd-questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Disktab and Disklabel curiosities. One works, one doesn't! Message-ID: <357BA9F7.101FAEDC@chalmers.com.au> References: <XFMail.980608105053.malte@webmore.com>
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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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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