TipsTrade Wiki - User contributions [en-gb]

File:HMRC Scale Charge-Rfsc-2014.pdf

2014-05-12T09:44:55Z

Root: HMRC VAT fuel scale charges - 2014

HMRC VAT fuel scale charges - 2014

File:TipsTrade Info Pack.pdf

2014-05-12T09:42:36Z

Root: TipsTrade Information Pack

TipsTrade Information Pack

File:Saab VIN.pdf

2014-05-12T09:41:54Z

Root: Saab VIN information

Saab VIN information

File:Focus RS.pdf

2014-05-12T09:41:27Z

Root: Ford Focus RS brochure

Ford Focus RS brochure

Systems

2014-04-15T11:23:21Z

Root:

== SATA/SCSI Hot plugging ==

'''Scan SCSI bus for hot plugged devices:'''
<pre>echo "- - -" > /sys/class/scsi_host/host<HOST>/scan</pre>

'''Spin down a device before hot plug removal:'''
<pre>echo 1 > /sys/block/<DEVICE>/device/delete</pre>

== Software RAID (mdadm) ==

Taken from mdadm cheat sheet[http://www.ducea.com/2009/03/08/mdadm-cheat-sheet/]

'''Creates a new array:''' 
This creates a new level 1 (mirrored) array over two devices - sda and sdb.
<pre>mdadm --create --verbose /dev/md0 --level=1 /dev/sda1 /dev/sdb2</pre>

'''Write the configuration:'''
<pre>mdadm --detail --scan >> /etc/mdadm/mdadm.conf</pre>

'''Remove a disk from an array:''' 
The disk needs to be failed first before it can be removed, although it's most likely in a failed state already.
<pre>mdadm --fail /dev/md0 /dev/sda1</pre>
and now remove it
<pre>mdadm --remove /dev/md0 /dev/sda1</pre>

'''Add a disk to an existing array:''' 
The partition table will probably have to be recreated.
<pre>sfdisk -d /dev/<ORIGINAL> | sfdisk /dev/<NEW></pre>
then add the device to the array.
<pre>mdadm --add /dev/md0 /dev/sdb1</pre>

'''Verifying the status of the RAID arrays:'''
<pre>cat /proc/mdstat</pre>
or
<pre>mdadm --detail /dev/md0</pre>

Systems

2014-04-15T11:17:34Z

Root: Created page with "== SATA/SCSI Hot pluggin == '''Scan SCSI bus for hot plugged devices:''' <pre>echo "- - -" > /sys/class/scsi_host/host<HOST>/scan</pre> '''Spin down a device before hot plug..."

== SATA/SCSI Hot pluggin ==

'''Scan SCSI bus for hot plugged devices:'''
<pre>echo "- - -" > /sys/class/scsi_host/host<HOST>/scan</pre>

'''Spin down a device before hot plug removal:'''
<pre>echo 1 > /sys/block/<DEVICE>/device/delete</pre>

== Software RAID (mdadm) ==

Taken from mdadm cheat sheet[http://www.ducea.com/2009/03/08/mdadm-cheat-sheet/]

'''Creates a new array:''' 
This creates a new level 1 (mirrored) array over two devices - sda and sdb.
<pre>mdadm --create --verbose /dev/md0 --level=1 /dev/sda1 /dev/sdb2</pre>

'''Write the configuration:'''
<pre>mdadm --detail --scan >> /etc/mdadm/mdadm.conf</pre>

'''Remove a disk from an array:''' 
The disk needs to be failed first before it can be removed, although it's most likely in a failed state already.
<pre>mdadm --fail /dev/md0 /dev/sda1</pre>
and now remove it
<pre>mdadm --remove /dev/md0 /dev/sda1</pre>

'''Add a disk to an existing array:'''
<pre>mdadm --add /dev/md0 /dev/sdb1</pre>

'''Verifying the status of the RAID arrays:'''
<pre>cat /proc/mdstat</pre>
or
<pre>mdadm --detail /dev/md0</pre>