Difference between revisions of "AddExtraHardDisk - SCSI"

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(New page: {{Languages|AddExtraHardDisk}} This HowTo is based on the AddExtraHardDisk Howto and points out the differences in doing this with some SCSI devices This Howto should be read in conjuctio...)
 
m
Line 38: Line 38:
 
  md: raid1 personality registered as nr 3
 
  md: raid1 personality registered as nr 3
 
  md: md1 stopped.
 
  md: md1 stopped.
  md: bind<cciss/c1d0p1>
+
  md: bind<cciss/c0d0p1>
 
  raid1: raid set md1 active with 1 out of 2 mirrors
 
  raid1: raid set md1 active with 1 out of 2 mirrors
 
  md: md2 stopped.
 
  md: md2 stopped.
  md: bind<cciss/c1d0p2>
+
  md: bind<cciss/c0d0p2>
 
  raid1: raid set md2 active with 1 out of 2 mirrors
 
  raid1: raid set md2 active with 1 out of 2 mirrors
 
  md: Autodetecting RAID arrays.
 
  md: Autodetecting RAID arrays.
  md: could not bd_claim cciss/c1d0p1.
+
  md: could not bd_claim cciss/c0d0p1.
  md: could not bd_claim cciss/c1d0p2.
+
  md: could not bd_claim cciss/c0d0p2.
 
  md: autorun ...
 
  md: autorun ...
 
  md: ... autorun DONE.
 
  md: ... autorun DONE.
Line 52: Line 52:
 
Info I needed was:
 
Info I needed was:
  
  md: bind<cciss/c1d0p1>
+
  md: bind<cciss/c0d0p1>
  md: bind<cciss/c1d0p2>
+
  md: bind<cciss/c0d0p2>
  
This tells me that I currently have 2 active partitions, p1 & p2, on drive c1d0
+
This tells me that I currently have 2 active partitions, p1 & p2, on drive c0d0 (controller 0, disk 0); if a secondary controller was added or used it would therefore be c1d0 (controller 1, disk 0).
  
Logically my new drive should be on c1d1, & the linux device file to match should be in /dev/cciss, so:
+
Logically my new drive should be on c0d1, & the linux device file to match should be in /dev/cciss, so:
  
  fdisk /dev/cciss/c1d1 (use ? or m to get help)
+
  fdisk /dev/cciss/c0d1 (use ? or m to get help)
  
 
Follow the prompts to add a Linux partition
 
Follow the prompts to add a Linux partition
Line 67: Line 67:
 
Lets see if we have a partition to work with:
 
Lets see if we have a partition to work with:
  
  fdisk -l /dev/cciss/c1d1
+
  fdisk -l /dev/cciss/c0d1
  
  Disk /dev/cciss/c1d1: 299.9 GB, 299992412160 bytes
+
  Disk /dev/cciss/c0d1: 299.9 GB, 299992412160 bytes
 
  255 heads, 63 sectors/track, 36472 cylinders
 
  255 heads, 63 sectors/track, 36472 cylinders
 
  Units = cylinders of 16065 * 512 = 8225280 bytes
 
  Units = cylinders of 16065 * 512 = 8225280 bytes
  
 
             Device Boot      Start        End      Blocks  Id  System
 
             Device Boot      Start        End      Blocks  Id  System
  /dev/cciss/c1d1p1               1      36472  292961308+  83  Linux
+
  /dev/cciss/c0d1p1               1      36472  292961308+  83  Linux
  
Yup, cool, p1 is partition 1 on device c1d1
+
Yup, cool, p1 is partition 1 on device c0d1
  
 
I don't want to add it to lvm to as it helps to make it more portable for me so this is all I need, your requirements may differ.
 
I don't want to add it to lvm to as it helps to make it more portable for me so this is all I need, your requirements may differ.
Line 87: Line 87:
 
Create filesystem & journal on device
 
Create filesystem & journal on device
  
  mkfs.ext3 -j /dev/cciss/c1d1p1
+
  mkfs.ext3 -j /dev/cciss/c0d1p1
  
 
=== 3 Mount ===
 
=== 3 Mount ===
Line 117: Line 117:
 
  /dev/md1                101018    27580    68222  29% /boot
 
  /dev/md1                101018    27580    68222  29% /boot
 
  none                  1980264        0  1980264  0% /dev/shm
 
  none                  1980264        0  1980264  0% /dev/shm
  /dev/cciss/c1d1p1   288362876    98368 273616444  1% /mnt/backupdrive
+
  /dev/cciss/c0d1p1   288362876    98368 273616444  1% /mnt/backupdrive
  
If you don't see a line for /dev/cciss/c1d1p1, something went wrong.
+
If you don't see a line for /dev/cciss/c0d1p1, something went wrong.
 
<br>Go back to step 2 and check if you followed all instructions correctly.
 
<br>Go back to step 2 and check if you followed all instructions correctly.
  

Revision as of 07:30, 7 December 2008


This HowTo is based on the AddExtraHardDisk Howto and points out the differences in doing this with some SCSI devices

This Howto should be read in conjuction with the AddExtraHardDisk Howto.

Description

How to add an extra SCSI hard disk to an existing (running) SME server 7.x.

It's intended for special purposes such as adding a backup drive to a SCSI RAID array controller, this will be the basis of this howto.

This was tested on a Compaq DL380 G3, Smart Array 5i, running a 4 disk RAID5 & adding a single 300GB drive for backup purposes.

Assumptions

  • I assume the SCSI drive is already installed and functioning.
  • If installed on an array controller the drive has been configured as a single drive RAID 0

Notes about RAID

  • If using a hardware SCSI RAID controller SME sees the hardware RAID device as a single drive
  • LVM ses it as a single disk degraded array, this is normal.

Step-by-step HowTo

1 Preparation

1.0 Mount the harddrive and fire up your machine.

1.1 Get direct shell access and login as root.

2 Partition

2.0 Now you need to identify the device name of the new disk.

cat /var/log/dmesg | grep md

This gives the physical device info, for this system:

[root@speedy]# cat /var/log/dmesg | grep md

md: md driver 0.90.0 MAX_MD_DEVS=256, MD_SB_DISKS=27
md: raid1 personality registered as nr 3
md: md1 stopped.
md: bind<cciss/c0d0p1>
raid1: raid set md1 active with 1 out of 2 mirrors
md: md2 stopped.
md: bind<cciss/c0d0p2>
raid1: raid set md2 active with 1 out of 2 mirrors
md: Autodetecting RAID arrays.
md: could not bd_claim cciss/c0d0p1.
md: could not bd_claim cciss/c0d0p2.
md: autorun ...
md: ... autorun DONE.
EXT3 FS on md1, internal journal</nowiki>

Info I needed was:

md: bind<cciss/c0d0p1>
md: bind<cciss/c0d0p2>

This tells me that I currently have 2 active partitions, p1 & p2, on drive c0d0 (controller 0, disk 0); if a secondary controller was added or used it would therefore be c1d0 (controller 1, disk 0).

Logically my new drive should be on c0d1, & the linux device file to match should be in /dev/cciss, so:

fdisk /dev/cciss/c0d1 			(use ? or m to get help)

Follow the prompts to add a Linux partition

Use the w key to write the partiton table & exit from fdisk

Lets see if we have a partition to work with:

fdisk -l /dev/cciss/c0d1
Disk /dev/cciss/c0d1: 299.9 GB, 299992412160 bytes
255 heads, 63 sectors/track, 36472 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
           Device Boot      Start         End      Blocks   Id  System
/dev/cciss/c0d1p1               1       36472   292961308+  83  Linux

Yup, cool, p1 is partition 1 on device c0d1

I don't want to add it to lvm to as it helps to make it more portable for me so this is all I need, your requirements may differ.

Hint: if you need to add it into lvm look at the RAID Howto in the wiki.


2.1 Prepare the new partition

Create filesystem & journal on device

mkfs.ext3 -j /dev/cciss/c0d1p1

3 Mount

Create a mounting point for the new disk

3.0 Create a directory underneath /mnt

mkdir /mnt/backupdrive

3.1 Automount at boot time
To automatically mount the partition at boot time, you need to add the following line to the file /etc/fstab
It can be done in the text editor Pico

pico /etc/fstab

Add the following data to the file (separate columns with a hit on the space-bar):

/dev/cciss/c1d1p1 /mnt/backupdrive ext3 usrquota,grpquota 1 2 

Make sure you end this line with a newline (with enter).
Hit <ctrl-x> to exit the editor, y and enter to save.

3.2 Mount manually (this time) all filesystems listed in /etc/fstab

mount -a

3.3 Report the amount of free disk space available on all mounted filesystems + the type of each filesystem, check if it looks OK.

df -v
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/mapper/main-root
                      67862104  49709680  14705232  78% /
/dev/md1                101018     27580     68222  29% /boot
none                   1980264         0   1980264   0% /dev/shm
/dev/cciss/c0d1p1    288362876     98368 273616444   1% /mnt/backupdrive

If you don't see a line for /dev/cciss/c0d1p1, something went wrong.
Go back to step 2 and check if you followed all instructions correctly.

We're all done, enjoy!