Trying to locate Raid Control settings:

October 5, 2010 at 08:18:21
Specs: Windows 7, N/A
Hi all,

I have a Poweredge 2750 that is running two seperate Raids on it and I still have two available slots available (Swappable HD)... How do I check if there is another Raid controller on this server?

Thx all,

See More: Trying to locate Raid Control settings:

October 5, 2010 at 08:34:34
You would look at the server specs or open the case and look at the mainboard.
According to this you only have a dual channel controller

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October 5, 2010 at 09:23:19
Looks like I need to install another RAID Controller... Any secrets I should know about this?

Thx Wanderer

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October 5, 2010 at 09:46:56
match the raid card to the available slot [voltage/mhz rating etc. ] if you have an available slot. With only two drive bays available I don't see the value in adding another card.

Why do you need a third raid?

If you don't have hot spares configured that is what those two available slots should be doing.

if you have hot spares then you should be able to put a drive in each and do a mirror set. No additional raid card or recabling required.

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Related Solutions

October 5, 2010 at 10:13:53
Rather then buying a NAS device I have two available slots on my server I want to utilize and make RAID1...

You can mirror w/o a RAID card... I'm a little confused on that.

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October 5, 2010 at 10:32:13
Mirroring without a raid card is called software mirroring. I would assume you are running a server OS on this box?

But with hardware raid there is no reason to do software mirroring.
Do you have hot spares configured on the raid arrays?
Do you know how to get into the Perc controller?

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October 5, 2010 at 12:35:05
I'm running RAID1 & RAID5 on this server... I have no available RAID Controllers on this server...

I know how to get into the Perc Controller.

Wanderer what are your thoughts of me mirroring via software on this server rather then hardware (SBS 2003)

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October 5, 2010 at 13:01:47
I never ever mirror by software except for training purposes but only use hardware. Hardware outperforms software. I even do sata raid on my new win7 home box.

BTW don't confuse a dual channel controller as multiple raid cards. There is only one raid card. From what you write I can tell you are not familiar with raid controllers. It is not a matter of available raid controller but of having drives available to raid on the existing controller.
Like I said before you should be able to put matching drives in the available slots and raid them together.
I take it you don't have hot spares configured in the system. Highly advise you do so. Of course this will cost you two drives and use the remaining slots.
Something is not adding up here. According to the specs you only have 5 bays
[Drive bays Hard drive bay for 5 x 1" or 2+3 hot-plug SCSI drives] but you write that you have two available hot swap slots which would mean you have 7 slots.

What do you really have?

This means you have no available raid controller slots since two would be used by the mirror and three would be used by the raid5. Unbless of course you really have 7 slots and the specs are not to your machine.

Might want to open the case and check the cabling. See if the cables go to all slots in the drive backplane.

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October 5, 2010 at 13:09:12
I have 7 total slots... 5 are being utilized by RAID1 and RAID5 and yes I'm just learning all this RAID fun stuff :)

No I don't have any hot spares...

Can I add a PCI RAID Controller...? Why am I asking this? Because I want to add another RAID1 for the two hdds (remaining slots)

When you say Dual Channel RAID Card I'm assuming you can have two seperate RAIDS on them... correct? With that said that's why I'm assuming I need to get another RAID Controller. (Your tell me, your the expert)

I appreciate your patience in this and assistance

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October 5, 2010 at 13:25:24
You can have multiple raids on one controller channel. Depending on controller you can have multiple raids across multiple channels.

This means if you have one channel that has 5 slots you could have a mirror set and a raid5 set on that channel. Multiple channels give you more flexibility and will allow you to raid across the two channels.

Right now I would suspect [though opening the case and confirming the cabling would go a long way in knowing if those two slots ard cabled to the raid controller] you have one mirror set with an available slot and one raid 5 with one available slot.

Those slots should be occupied by hot spares.

Otherwise you should be able to drop identical drives into the two slots, go into the perc bios or via desktop software and configure the two drives as a mirror set. Then you reboot, let the array build and then go into disk management and partition/format the volume.

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October 5, 2010 at 13:35:30
Hi again Wanderer,

I want to make sure I understand you correctly...So you can have multiple RAIDS on one RAID controller?

I will open the server and take a look. I will be in-house Saturday. Don't be surprised if you hear from me this weekend... You have been very helpful and I wish there were more like you.

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October 5, 2010 at 13:50:05
"So you can have multiple RAIDS on one RAID controller?"
Yep-r-do! As long as you have a minimum of 6 slots, you can do two raid5's

I will check back on Monday since I have construction projects I do after work and weekends [its how I keep fit with my 5 day a week desk job :-)]

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October 6, 2010 at 06:32:33
Understood... LOL

I sent you a personal message.

Thx again Wanderer

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