On Tuesday, 11 November 2003 at 22:44:01 +0000, Chris Howells wrote: > On Tuesday 11 November 2003 22:16, Greg 'groggy' Lehey wrote: > >>> I've just bought 2 x 160GB drives which I want to RAID 1 with vinum. I >>> used /stand/sysinstall to fdisk and disklabel them, mounted them as >>> /temp1 and /temp2 and checked the size of them using 'df' to stick into >>> my vinum.conf file. >>> >>> I'm a bit confused though; the output of df does not include the 8% or >>> whatever of the slice that is reserved for root by default. >> >> It looks like it to me. > > What I mean is that e.g. in the output from df: > > /dev/vinum/sauron1 149118276 9447 137179367 0% /vinum > > the 149118276 (k) is the total size of the disk, whereas the 137179367 is the > available space ( 149118276 - (8% of 149118276)).
Correct. df reports on the file system. > I was following the instructions in the Absolute BSD book which now > that I've done it I think is confusing. I haven't seen that. What does it say? It may be wrong. >> You're confusing Vinum and UFS. Vinum is a virtual disk. UFS is a >> file system. It's UFS which reserves 8% or so of the file system (not >> of the slice, which is a term which relates neither to UFS nor to >> Vinum). If you reserve space on the disk and don't give it to Vinum, >> Vinum doesn't use it. Period. > > Right. My confusion was on how to determine the size of the slice to stick > into the vinum.conf file... According to Absolute BSD, the right thing to do > is to read the 137179367 column, and use that value in vinum.conf. That's wrong. Could you quote the text, please? > But obviously that isn't using the whole disk because it does not > include the 8% of the drive that is set aside for root. None of the drive is set aside for root. > In all the example vinum.conf files that I could find, there was a > hard-coded size of the vinum drive. There are others. In the man page, for example. >> That's because you haven't used all the space. If the drives are the >> same, use 'length 0' for the subdisks and you'll get all the space in >> the volume. > > Aha. I didn't know that you could set 'length 0', didn't see that documented > anywhere. This looks like an RTFM. Greg -- When replying to this message, please copy the original recipients. If you don't, I may ignore the reply or reply to the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address and phone numbers.
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