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Raid issue

By dji22 ·
Hi I am new to RAID, I just ordered four serial ata drive, please let me know how I can set them up so they will work great and on which one I have to load the OS, because I am using this server for my internet cafe.

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by willcomp In reply to Raid issue

I'm not going to provide that level of detail to someone who thinks it's only worth 20 lousy points.

Dalton

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by willcomp In reply to

Sorry I was so caustic. Realized you are new to TR.

We need some info. What motherboard, how many SATA controllers on motherboard, what type of array (mirrored or striped)?

What is drive model(s)?

Dalton

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by dji22 In reply to Raid issue

Point value changed by question poster.

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by Skidoggeruk In reply to Raid issue

Some basics, if you are new to Raid.

A mirrored array is when 1 drive "mirrors" the other exactly. You might want to mirror the main OS to reduce downtime, where say, the main drive goes down, you can replace/repoint/recable system to boot from the "mirrored" drive. Some see this as an expensive waste of money, as often the mirror drive is seldom used, although a lifesaver when you really need it. You may want to check this occasionally, as it will be a heart-breaker to discover your mirror had "broken" months ago, when you need to do a recovery.

Striped partitions is where you use 3 or more drives to store data across this series. So, when one drive goes down, you replace this drive and the other drives re-build this drive, parsing together what they already know.Again, you need to check these occasionally, as, should you lose more than one drive, they will be unable to "rebuild".

That is a pretty simple explanation of these, I imagine there will be loads of web pages explaining this a lot better than me out there. Do some research before you implement to save yourself a lot of time and give yourself a bit of confidance in your disaster recovery.

If you have the time and inclination, you can test out and understand your DR using different methods, before you go live, being ever-willing to restore everything when it goes wrong.

You don't mention a backup device, like a tape drive, this is another expense that may be worth it's weight in a DR situation.

Good Luck

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by sgt_shultz In reply to Raid issue

it depends on what you are wanting to get from RAID. basically, you can get either redundancy or speed. one RAID configuration will give you both: RAID 5 striping with parity. you could do it with 3 OR 4 drives. you could use one for a 'spare' and yield you with a fast, robust 'drive' the size one ONE of your 4 presumably matched drives.
each RAIDed array will look like one drive to the system. so the question of which one to use to load the os is maybe a non-question.
my 2 cents is, after you set up the drive and befoe you use for anything important, read the controller manual and practice one drive failing (like take power off it for a test). see what kind of notification you get. If one drive fails you can recover. if two fail, you are just as hosed as if you didn't have RAID. so make sure you get notified about any problems or you gonna have to check daily maybe...
all will be revealed in the manual with the controller betcha

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