Editing RAID Cards (section)

== Creating/removing mirror ==
=== via CLI ===

This will add a new mirror from drives located in the 2nd and 3rd slots:

<pre>cd /usr/local/sbin/; megarc -addCfg -a0 -R1[0:2,0:3] WB CIO
echo "scsi add-single-device 0 0 1 0" > /proc/scsi/scsi</pre>

To delete that mirror:

<pre>cd /usr/local/sbin/; megarc -delLD -a0 -L1
echo "scsi remove-single-device 0 0 1 0" > /proc/scsi/scsi</pre>

This will add a new mirror from drives located in the 4th and 5th slots:

<pre>cd /usr/local/sbin/; megarc -addCfg -a0 -R1[0:4,0:5] WT CIO
echo "scsi add-single-device 0 0 2 0" > /proc/scsi/scsi</pre>

To delete that mirror:

<pre>cd /usr/local/sbin/; megarc -delLD -a0 -L2
echo "scsi remove-single-device 0 0 2 0" > /proc/scsi/scsi</pre>

None of the above is data destructive. You can remove a mirror and re-create it and all the data will still be there...as long as you don't initialize the drive.

=== via BIOS configuration utility or Megamgr ===

Totally new configuration:
<pre>Configure,
New configuration
(space 2x to select 2 drives)
Enter to end selection
F10 to configure
Space to select Span-1
F10 to configure
RAID=1
StripeSize=64k
Write policy=WRBACK
Read policy=NORMAL
Cache Policy=Cached IO
ESC, accept</pre>

NOTE: when adding an additional drive, choose view/add not New Configuration – otherwise you'll wipe out the existing mirror/config.

Adding to existing configuration:
<pre>Configure->View/Add Configuration->
([space] on the 2 drives)->[enter]
F10
[space]
Span-1
F10
Advanced->Cache Policy=CachedIO
Accept
Save
Exit
</pre>

If this was added to a running machine, to get the device to show up (in linux) run:
 echo "scsi add-single-device 0 0 1 0" > /proc/scsi/scsi

Make sure SCSI transfer rate is 320M under objects, channel, channel 1

Go to objects, adapter

Make sure alarm is enabled


----


To remove a mirror:

 Objects->Logical Drive->(move cursor to drive)->F5

If on a running server (assuming you unmounted it first):
 echo "scsi remove-single-device 0 0 1 0" > /proc/scsi/scsi


----


Create mirror from volume:

#Remove drive (megarc -delLD -a0 -L1)
#Then re-add config (I did it with megamgr)
#Then fail the new drive and rebuild it


----


This will add a new '''VOLUME''' from drive located in the 2nd slot:

<pre>Configure->View/Add Configuration->
([space] on the #2 drive)->[enter]
F10
[space]
Span-1
F10
Advanced->Cache Policy=CachedIO
Accept

Initialize->Logical Drive 2->[space]->F10
Save
Exit</pre>

If on a running linux system, to add the device:

 echo "scsi add-single-device 0 0 1 0" > /proc/scsi/scsi