Re: RAID5

hwlyo wrote:
After reading trying different thinks, I had installed
a new SCSI Hard drive on my SCO 5.0.7 (a 5th SCSI disk)

I know now that I have 5 disks at the beggining I had 3 hard disks on a
RAID5, now I have a 4th disk added to the RAID5, and the 5th outside of
the RAID, the disk number 4 (inside of the RAID) SCO can not see it.
What shall I do to make SCO read the new part of the RAID (I am using
RAID5)

I read http://aplawrence.com/Unixart/moredisk.html but I can only add a
new hard disk but I need on a RAID5 for redundancy...

These are the disks I have, but I am a bit confused because I had taken
the 5th hard disk out to be sure that I am going to format the right
hard disk, and I had the same information that is shown below.

What I want to do is make the /root partition twice bigger...

Thanks for your help...

# hwconfig | grep Sdsk
name=Sdsk vec=- dma=- cyls=17750 hds=255 secs=63 unit=0 fts=sdb
name=Sdsk-0 vec=- dma=- Vnd=MEGA 1 Prd=LOGICAL DRIVE 0 Rev=
name=Sdsk vec=- dma=- cyls=17750 hds=255 secs=63 unit=1 fts=stdb
name=Sdsk-1 vec=- dma=- Vnd=MAXTOR Prd=ATLAS15K_73SCA Rev=DTA0

# divvy -P -N /dev/hd00
0 0 30719 boot EAFS
1 30720 2651135 swap NON FS
2 2651136 142560799 root HTFS
6 142560800 142560809 recover NON FS
7 0 142568810 hd0a WHOLE DISK
# divvy -P -N /dev/hd0a
0 0 30719 boot EAFS
1 30720 2651135 swap NON FS
2 2651136 142560799 root HTFS
6 142560800 142560809 recover NON FS
7 0 142568810 hd0a WHOLE DISK
# divvy -P -N /dev/hd01
0 0 30719 - EAFS
1 30720 2651135 - NON FS
2 2651136 142560799 - HTFS
6 142560800 142560809 - NON FS
7 0 142568810 hd01 WHOLE DISK
# divvy -P -N /dev/hd11
0 0 30719 - NON FS
1 30720 2651135 - NON FS
2 2651136 142560799 - NON FS
6 142560800 142560809 - NON FS
7 0 142568810 hd11 WHOLE DISK

- Hide quoted text -
- Show quoted text -
Scott McMillan wrote:
On 19 Sep 2006 04:54:37 -0700, "hwlyo" <hul...@xxxxxxxxx> wrote:

I had tried to find out how the SCSI arrange disks are in the SCO
5.0.7, but I can't find the solution.

I tried "df" command but it just gives me the file systems that are
mounted.

I also tried "df /dev/hd* " and "df /dev/hd* " but the result is:

df -k /dev/hd*
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/root 139909664 117870041 22039623 85% /
/dev/root 139909664 117870041 22039623 85% /
.
.
.

df -k /dev/hd* ¦ wc -l
29
......so 28 hard disks, but I have 4 or 5 SCSI on the SCO computer.

Do you have a solution?

I want to know where is / mounted and how can I add a New SCSI Hard
Disk

Thanks

To help determine disks in your system:

1) hwconfig should show you how many disks are configured (if they are
all SCSI, try 'hwconfig | grep Sdsk').

NOTE: This gives you the disks configured within the OS, not the
physical number of disks in the box.

ALSO NOTE: if the disks are attached to a RAID controller, this will
only report the number of *logical disks* configured within the OS.
You will need to use your RAID controller's utilities to determine the
number of disks it is offering to the OS (this should also tell you
how many *physical disks* are attached, and how the logical disks are
configured).

2) Try running 'sconf -v'. See "ALSO NOTE" above as it applies here.

And to add hard disks:

http://wdb1.sco.com/kb/showta?taid=109379&qid=1071176901&sid=17061481...
http://aplawrence.com/Unixart/newdisk.html

Scott McMillan


If you have hardware RAID5, then use the Raid controllers built in tools to add the 5th disk or mark it as a hot spare.

Usually you get access from the RAID controller's BIOS - look for messages about what key to use during bootup. HP's Smartarray uses F8 to get access for example.

With hardware RAID SCO just sees 1 large hard disk and has no knowledge of the underlying mechanics.

However, the advice about using a Supertar to generate emergency boot CD or disks and backup prior to adding the 5th disk is a good idea. Murphy is out there waiting ya know :)

--
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SCO Authorized Partner
Unix/Linux/Windows/Hardware Sales/Support
(209) 745-1401 Cell: (209) 251-9120
E-mail: patubb@xxxxxxxxxxx
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