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Filesystem - umount the / (root) file system

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Operating Systems Solaris Filesystem - umount the / (root) file system
# 1  
Old 07-29-2009
Filesystem - umount the / (root) file system
Hi all

Is it ok to umount the / (root) file system?

Because recently i had extend the swap space by add the cylinders,
now only found that the cylinders is overlap with the root. Is it ok for future server operation?

Code:
partition> print
Current partition table (original):
Total disk cylinders available: 8921 + 2 (reserved cylinders)

Part      Tag    Flag     Cylinders        Size            Blocks
  0       root    wm      67 - 1955       14.47GB    (1889/0/0)  30346785
  1       swap    wu       1 -  132        1.01GB    (132/0/0)    2120580
  2     backup    wm       0 - 8920       68.34GB    (8921/0/0) 143315865
  3 unassigned    wm       0               0         (0/0/0)            0
  4 unassigned    wm       0               0         (0/0/0)            0
  5 unassigned    wm       0               0         (0/0/0)            0
  6 unassigned    wm       0               0         (0/0/0)            0
  7       home    wm    1956 - 8920       53.35GB    (6965/0/0) 111892725
  8       boot    wu       0 -    0        7.84MB    (1/0/0)        16065
  9 unassigned    wm       0               0         (0/0/0)            0

Last edited by SmartAntz; 07-29-2009 at 06:49 AM..
# 2  
Old 07-29-2009
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# 3  
Old 07-29-2009
Quote:
Originally Posted by SmartAntz
Is it ok to umount the / (root) file system?
No, you obviously can't unless you are using an OS running on a different root, like in faisafe mode boot.
Quote:
Because recently i had extend the swap space by add the cylinders,
now only found that the cylinders is overlap with the root. Is it ok for future server operation?
Ouch. Your system is ready to self destroy at any time.

Shutdown it as soon as possible and fix the partition table.
# 4  
Old 07-29-2009
If that machine uses the swap cylinders that are overlapping your root slice you can kiss any data on them goodbye. The only way to unmount root is to shutdown the system. Do what jilliagre says.
# 5  
Old 07-29-2009
You do not have to reboot. Run "swap -d /dev/dsk/c0t0d0s1" (or whatever the appropriate device is) ASAP, though, to remove that swap device.

Then fix the partition table.
# 6  
Old 07-29-2009
Thanks all, i had fixed the partition table.
and increase the swap size by Adding File System swap

Code:
Part      Tag    Flag     Cylinders        Size            Blocks
  0       root    wm      67 -  804        5.65GB    (738/0/0)   11855970
  1       swap    wu       1 -   66      517.72MB    (66/0/0)     1060290
  2     backup    wm       0 - 8920       68.34GB    (8921/0/0) 143315865
  3 unassigned    wm       0               0         (0/0/0)            0
  4 unassigned    wm       0               0         (0/0/0)            0
  5 unassigned    wm       0               0         (0/0/0)            0
  6 unassigned    wm       0               0         (0/0/0)            0
  7       home    wm     805 - 8920       62.17GB    (8116/0/0) 130383540
  8       boot    wu       0 -    0        7.84MB    (1/0/0)        16065
  9 unassigned    wm       0               0         (0/0/0)            0

# swap -l
swapfile dev swaplo blocks free
/dev/dsk/c2t0d0s1 31,385 8 1060280 1060280
/opt/myswapfile - 8 1048568 1048568

---------- Post updated at 10:47 AM ---------- Previous update was at 10:34 AM ----------

another question,
if i wanna increase the root Cylinders, how to do that?
# 7  
Old 07-30-2009
Quote:
Originally Posted by SmartAntz
another question,
if i wanna increase the root Cylinders, how to do that?
Buy another disk, move /export there and grow / size.
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