Re: Replacing a raid 5 controller with different card

Do NOT create a C: partition of only 10-15 GB. That's way too small over time. I wouldn't create one of less than 25 GB personally.


"Ray Brunelle" <RayBrunelle@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message news:20FFF758-53DD-4AEC-8523-95DFA155C119@xxxxxxxxxxxxxxxx
That was my understnading too but here is the response I was given by someone
4 Drives is ok. What you need to do is..

use the RAID controller software to:
- Build a RAID 1 Volume of about 10-15GB on drive 0 and 1 (only has to fit
the operating system)
- Build a RAID 5 Volume with the remaining capacity on drive 0,1,2 and 3
with drive 3 as the spare

You will lose some drive space, but the system will be much faster than
before... at least for the part not depending on S-ATA or the RAID
I guess I will see if this is possible with my card

"Jim Behning SBS MVP" wrote:

My understanding is that a hardware array is a collection of hard
drives present to the OS at the bios level. You go in to the hardware
raid controller and you make an array based on the number of drives
and what the card will do. 2 drives might let you make one array using
Raid 1. 4 drives might let you make an array using Raid 5 with 3
drives and a hot spare, 4 drives in the Raid 5 array, or you might be
able to make two Raid 1 arrays with no hot spare. Hardware raid lets
you choose the whole hard drive to bring in to an array. You cannot
bring in part of a hard drive.

In the operating system you make partitions. Choose the size of the
partitons when setting up the OS or later if you have spare space on
one of the arrays.

If you are attempting to do software raid many wiser than me say don't
do it.

I am doing at least 20 gigs for the C: partiton, maybe even 30 gigs. A
few other partitions to hold Exchange, company files and user files.

On Sat, 3 Mar 2007 10:37:10 -0800, Ray Brunelle
<RayBrunelle@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:

>Someone suggested I create two arraya i my new card, a raid 1 using 15GB >of
>disks 0and 1 and a reiad 5 using the remaining portions of disk 0,1and 2 >I
>imagine I will lose 15 gb of disk two this way but he suggested >performance
>would be improved. Is it possible to have two diferent arrays in the >same
>physical drives? I have 160GB drives 3 in the raid 5 and one as a hot
>spare. Would the above be the best configuration?
>"Paul Shapiro" wrote:
>> I did this with a test system by first installing the new raid card >> into the
>> existing system, but with the existing disks still attached to the >> existing
>> controller. Install the new raid driver. Then back up the system which >> now
>> contains the necessary drivers. If your finances permit, it's safest >> to use
>> new disk drives so the old ones are still available in case of >> problems.
>> Remove the existing disks, disable the existing controller and install
>> Windows Server onto the new raid. You have to be on the same Windows >> service
>> pack as the system you backed up, but you don't need to install any of >> the
>> SBS stuff- no Exchange, etc. Create partitions to match what you had >> in the
>> old system. The partition sizes can change but you need the same drive
>> letters available before restoring the old system. Then you can do >> your
>> restore. Its been a while, but if I remember correctly, the system >> rebooted
>> without any problems after the restore.
>> Paul Shapiro
>> "Ray Brunelle" <RayBrunelle@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in >> message
>> news:DC73FA87-7DAE-420C-AF54-D0277E4EFE8F@xxxxxxxxxxxxxxxx
>> >I don't see how a swing migration is easier than backing up the >> >server,
>> > upgrading the hardware and then restoring the server. If I was to >> > swing,
>> > what
>> > is the min hardware for the temp box?
>> >
>> > "Charlie Russel - MVP" wrote:
>> >
>> >> There's almost no chance that anything except a clean migration is >> >> going
>> >> to
>> >> work. Your RAID array is highly unlikely to be recognized by the >> >> new
>> >> controller. And even if it is, you've got the issue of drivers.
>> >>
>> >> I'll tell you what I'm doing on my system to get around this - I'm >> >> doing
>> >> a
>> >> swing migration off to a temporary box, and then swinging back to >> >> the new
>> >> box with the updated hardware.
>> >>
>> >>
>> >> -- >> >> Charlie.
>> >>
>> >>
>> >>
>> >> "Ray Brunelle" <RayBrunelle@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in >> >> message
>> >> news:353D1683-7F31-4A54-8F86-F60CADDEDE02@xxxxxxxxxxxxxxxx
>> >> >I am using a Dell poweredge 1420 server with windows sbs 2003.
>> >> >Everything
>> >> >is
>> >> > good except the CERC raid controller they sold me is a slug. I >> >> > would
>> >> > like
>> >> > to
>> >> > replace it with a ARC -1100. I have 3 SATA hd's partitioned into >> >> > two
>> >> > logical
>> >> > drives c:\ containing the operating system and E:\ containing the >> >> > data.
>> >> > What
>> >> > is the best way to move the existing drives over to the new card? >> >> > Just
>> >> > plugging them in to the new card and rebooting is probably not >> >> > going to
>> >> > work is it?