Question about Tyan M7902 (m7902tarosodimm) SCSI Controller

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How to make raid 10 with Tyan M7902?

I have 2 cable data (channel scsi 1 & 2) and i cant make it raid 10 as ive put each channel with 2 hardrive, does it mean to make raid 10, all hardrive must be within 1 channel cable?

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Yes. Unless you're using HP-Ux's LVM or some other Logical Volume Management software package, the controller can only perform mirroring on the same channel. I see no value in running Raid 10... all it does is strip the mirrored data on the 2nd set of disks. It uses the same overhead as mirroring and offers minimal benefit with the potential for more overhead in slowed bandwidth. Make it simple and just mirror the drives with Raid 1.

Posted on Sep 08, 2007

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I was running 2 scsi drives in a raid 0. One drive failed, how can i retrieve the files off the the still working drive, and can i?
Hi there, Sorry to break the bad news, but when one hard drive fails in a RAID 0 configuration, all data is lost. Your only chance is to take it to a professional data recovery center, where you could be charged hundreds, or thousands of dollars for a data restore. Seagate will do these recoveries for you. RAID 0 has no redundancy, unfortunately. Sorry about that, Alex

Jun 02, 2011 | Seagate ST373453LW 73GB 15KRPM 68pin U320...

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CAn I disable RAID on a DEll powervault 770n server
Its called the JBOD RAID option - just a bunch of discs.

I don't know of any system that makes a RAID array an operational imperative, I would say the answer to your question is yes.

RTFM.

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No SCSI Chips found on the adapter
This is a serious problem and you could easily guess wrong and blow away your data.
Good news is that Dell servers have lifetime support. Without a warranty you will have to pay for any parts you need but, if you are lucky, you won't need any. If you do get the part # from Dell and check eBay for it.
Get the Service Tag from the server and call Dell Technical Support.
You can get the phone # from their website.

Aug 14, 2009 | Dell PowerEdge 6400 Server

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Meaning of Symbols on Hd rack?
If the server is configured with split SCSI channels these indicate which bays are part of each of the two channels. The common use for this would be to use the split with two drives for a RAID 1 system drive and the remaining four for RAID 5 data or in some cases two sets of RAID 1.

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Boot problem with IBM xseries 206 - SCSI Drive and SATA drive
Refer to user's manual how to set the boot order in BIOS.

Jul 17, 2009 | IBM eServer xSeries 206

1 Answer

About SCSI
Replace the hard drive with a drive that is the same type and the same size, or larger. It will rebuild itself.

By same type I mean that the connector on the back of the drive and the speed of the drive interface must be the same. If the new drive spins at a different rate it will not create a problem, except that if it is slower it will make read/writes slower. If it is larger it will only use part of its capacity, matching the capacity of the other drives.

Note that if you were to replace all drives with larger drives (one at a time) the capacity of the entire array would be the same as the original. If you want a larger array it must be built from the start with that larger capacity.

Take out the bad drive. If you can get the exact same drive, do it, otherwise look it up on the manufacturers web site to find out size and type.

While there are a few possible RAID configurations that you could be using on that server, the chances are overwhelming that it is RAID level 5 that you are using. This RAID level is tolerant of a single drive failure. If you lose another drive before your new drive rebuilds your data will be lost. Hopefully you have a backup.

RAID 5 stripes the data and the parity data across all available drives and when a drive fails, the missing data is rebuilt on the fly from the parity data. When a replacement drive is installed the parity data is used to rebuild the data that belongs on that drive. The advantages of RAID 5 are fault tolerance (of a single drive) and speed because each drive only has to provide or write its portion of the total data being accessed or written.

May 26, 2009 | Acer Altos G710 Server

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Raid Failure
just bad luck

Jan 02, 2009 | IBM Server Raid 3L ( 01k7352 )...

1 Answer

Raid 0 on Intellistation 6221?
That particular work station comes with both IDE and SCSI drive interface controllers. The IDE drive should be used for your OS. The SCSI drives for your data storage. Now, the issue is to get the SCSI to work in RAID_0 as I understand.

You iwll need a RAID controller such as Adaptec AHA-3940AU WD SCSI Host Controller, which may be found on eBay (used) for a very affordable price. The driver software may be downloaded directly from Adaptec, so I suggest you do that in the iterim peroid, and store drivers on a USB thumb drive.

Hope this helps you.

Dec 21, 2008 | IBM IntelliStation Z Pro 6221 PC Desktop

1 Answer

Service Tag 277MW0j-DY
The best solution is to get another power supply and back the data up.

If you can't do that, and you have SCSI drives, then I would suggest marking the drives (0, 1, 2, 3, etc) and putting them in another Dell Power Edge server with the same RAID card and reading them that way. It can be dangerous to your data if you don't know what you are doing.

There are programs out there that can help you re-construct your RAID if needed. CaptainNemo and RAID Reconstructor have helped me in the past. If you have a Dell Perc 3/DI in your existing server, I may have the parameters for those programs.

Let me know.

Nov 13, 2008 | Dell PowerEdge 1800 Server

1 Answer

Biostar P4M800-M7A Motherboard SATA RaiD Mirror Array As C boot Disk
hi, you need not have to upgrade the BIOS,, set the SATA HD on the IDE channel in the BIOS, or what options r avilable for SATA controller, if it is set to RAID, you will need a raid utility to format the SATA, or it wont shoe in windows, let ,e know

Dec 17, 2007 | Biostar P4M800-M7A Motherboard

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I was running 2 scsi drives in a raid 0. One drive failed, how can i retrieve the files off the the still working drive, and can i?

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