gconcat, convert manual to automatic

[Matt Buckland]

Hello there Geom list!

Forgive me if I sound stupid, I am quite new to geom, but have searched
the archives and could not find an answer to my question.

I have created a volume using the following command:

gconcat create big0 /dev/ad4 /dev/ad6 /dev/ad10

I then created a filesystem:

newfs /dev/concat/big0

I then added a disk and recreated the volume:

gconcat create big0 /dev/ad4 /dev/ad6 /dev/ad10 /dev/ad8

and grew the filesystem

growfs /dev/concat/big0

Everything is fine when I manually create the volume, I can mount it and
fsck it, but when I try:

gconcat label big0 /dev/ad4 /dev/ad6 /dev/ad10 /dev/ad8

I cannot mount or fsck it, fsck gives me the following output:

** /dev/concat/big0
BAD SUPER BLOCK: VALUES IN SUPER BLOCK DISAGREE WITH THOSE IN FIRST
ALTERNATE
ioctl (GCINFO): Inappropriate ioctl for device
fsck_4.2bsd: /dev/concat/big0: can't read disk label

I have also noticed a difference in the position of one of the
providers, which is presumably causing the problem and is presumably
because the metadata has been written and is taking up the space. The
two listed outputs look like this:


Geom name: big0
State: UP
Status: Total=4, Online=4
Type: MANUAL
ID: 1212663410
Providers:
1. Name: concat/big0
   Mediasize: 1200273629184 (1.1T)
   Sectorsize: 512
   Mode: r0w0e0
Consumers:
1. Name: ad4
   Mediasize: 300001443840 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 0
   End: 300001443840
2. Name: ad6
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 300001443840
   End: 600092172288
3. Name: ad10
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 600092172288
   End: 900182900736
4. Name: ad8
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 900182900736
   End: 1200273629184


and this:


Geom name: big0
State: UP
Status: Total=4, Online=4
Type: AUTOMATIC
ID: 2839129485
Providers:
1. Name: concat/big0
   Mediasize: 1200273627136 (1.1T)
   Sectorsize: 512
   Mode: r0w0e0
Consumers:
1. Name: ad4
   Mediasize: 300001443840 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 0
   End: 300001443328
2. Name: ad6
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 300001443328
   End: 600092171264
3. Name: ad10
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 600092171264
   End: 900182899200
4. Name: ad8
   Mediasize: 300090728448 (279G)
   Sectorsize: 512
   Mode: r0w0e0
   Start: 900182899200
   End: 1200273627136




So, eventually, my question is: is it possible to have this volume
automatically created on loading of the kermel module, or must I dump
and restore the filesystem?

Would it have made a difference if I had made the filesystem within a
partition, rather than directly onto the disk?



Thankyou very much for any input on this.


Matt 
-- 
Matthew Buckland, Network / Support Analyst
Wordbank Limited
33 Charlotte Street, London W1T 1RR
Direct line: +44 (0) 20 7903 8847
Fax: +44 (0) 20 7903 8888
<http://www.wordbank.com/>