Re: issue with mdadm and mirroring drives

Sorry to load up on related issues in this mail, but have a big issue:
After having synced my mirrored drives in software raid -
I get the following error:
error: superfluous RAID member (2 found).

the boot drive is /dev/sdc1 but added another one to the mirror - /dev/sdd1
my questions :
1. should i put both drives in the bootup bios scan ?
2. should i set their partitions as bootable in fdisk ?
3. how do i fix this without having to zero out the drive and re-add
it to the mirror ?


On Tue, Jan 24, 2012 at 12:34 PM, Joey L <mjh2000@xxxxxxxxx> wrote:
In related questions - i hope you can answer - are :

1. why do i get an error when trying to make swap partition - i get
this error below after running fdisk, creating a primary partition
/dev/sdd2 and then changing the type - with t -
As in below ---

2. the /dev/sdd drive is the mirrored drive in the set - do i have to
set /dev/sdd1 active in fdisk ???


root@rider:~# mkswap /dev/sdd2

mkswap: error: swap area needs to be at least 40 KiB
Usage: mkswap [-c] [-pPAGESZ] [-L label] [-U UUID] /dev/name [blocks]
root@rider:~# fdisk -l /dev/sdd


Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x0005d0fd


   Device Boot      Start         End      Blocks   Id  System
/dev/sdd1               1      121091   972663426   fd  Linux raid autodetect
/dev/sdd2          121092      121601     4096575   82  Linux swap / Solaris


thanks
mjh



On Thu, Jan 19, 2012 at 12:44 PM, Marc Auslander <marcausl@xxxxxxxxx> wrote:
Jon Dowland <jmtd@xxxxxxxxxx> writes:


Pretty sure at that stage it has loaded modules that let it interpret
a selection of filesystem types, in order to fetch grub.cfg (and
further

How does it decide which partition (on which disk) and what pathname
to use to find grub.cfg.  I assume one it chooses a partition it can
look at partitions, figure out what kind they are, and figure out how
to read them.

Also - if the chosen partition is raid1 does it "assemble" the array
or just use the chosen partition as if it where a degraded array.


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