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Swap file system

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# 1  
Old 05-06-2009
Question Swap file system
This questions only concerns Solaris 10.

Let's say I have swap configured like so in /etc/vfstab:

Code:
/dev/dsk/c1t0d0s1       -       -       swap    -       no      -
/dev/dsk/c1t1d0s1       -       -       swap    -       no      -
/dev/md/dsk/d1  -       -       swap    -       no      -

and in SVM:

Code:
d1: Mirror
    Submirror 0: d901
      State: Okay
    Submirror 1: d911
      State: Okay
    Pass: 1
    Read option: roundrobin (default)
    Write option: parallel (default)
    Size: 20962560 blocks (10.0 GB)

d901: Submirror of d1
    State: Okay
    Size: 20962560 blocks (10.0 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c0t0d0s1          0     No            Okay   Yes

d911: Submirror of d1
    State: Okay
    Size: 20962560 blocks (10.0 GB)
    Stripe 0:
        Device     Start Block  Dbase        State Reloc Hot Spare
        c0t1d0s1          0     No            Okay   Yes

If the mirror stays intact and one of the other drives (either /dev/dsk/c1t0d0s1or /dev/dsk/c1t1d0s1) fail, will my system panic and crash or just give a warning message and continue on?

What if one the mirrored drives fails? Will the system panic and crash or continue on with an error message.


Thanks in Advance!
# 2  
Old 05-12-2009
The system will likely leave the disk failure unnoticed if the swap space isn't used which is the usual case.
Otherwise, I suspect a panic for unrecoverable read errors and possibly something less extreme for write errors.
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