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theoretical stripset w/parity

By azizhakim ·
A little confusion regarding above issue.In
preparation for my Enterprise exam,studying
Fault tolerance.My question is since system
& boot partition cannot be part of stripe set w/parity would it be correct to create a system partition & another partition during installation to store the installation files ie. WINNT.It could possibly be the entire free remaining space on the drive.Thereafter
the installation is complete,create your stripe set w/ parity.The nt server book i am reading now tells me the winnt folder cannot be part of stripe set.Since that is the case
i do not understand how i can recover if my disk0 is inaccessible where winnt folder resides & no referance to the folder in any other drive that i can point to in my boot.ini boot disk.i know i am making a lot of it but i am trying to recreate this at home for practise & i also hope i made a little sense to warrant a reply?MANY THANX FOR ANY INPUT--AZIZ

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theoretical stripset w/parity

by Cader In reply to theoretical stripset w/pa ...

The only way to create a "backup" or secondary method of booting an NT system is to Mirror the system/boot drive. Even though you cannot create a striped set out of the boot/system drive, you can mirror it. Then, if you have created a NT boot diskwith the 3 necessary files, you can modify the boot.ini on the boot disk to point to the mirrored drive to boot up NT. You can then at that point, remove the primary drive (if this one fails), replace it with a new drive, boot from the boot disk (witch points to mirrored second drive), Enter disk administrator, break the old mirror and create a new one... I hope this is what you were wanting to know..

Ryan

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theoretical stripset w/parity

by azizhakim In reply to theoretical stripset w/pa ...

Thanx-just did exactly as you stated,
tremendous insight.very helpful-aziz

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theoretical stripset w/parity

by avachon In reply to theoretical stripset w/pa ...

Hi Aziz, the first respondent is right on the money. In the enterprise exam, microsoft will most likely present you with a scenario that stipulates the required and optional results and then poses a solution. You then judge whether the proposed solution meets the required result, the optional or some combination. Mirror sets (and disk duplexing) are the only options for fault tolerance of the system partition (boot files). When you set up a mirror, create a boot disk for it as #1 said, but change the arc naming in boot.ini so the boot disk points to the mirror. In essence, you'd have two boot disks, one that points to each disk so you could boot to either disk in the event of a failure (since you would not know ahead of time which disk would fail). Duplexing involves two controllers and two disks so you have fault tolerance if a controller failed. Striping with parity allows you to use 3 or more disks. Choose free space roughly the same size (e.g., 2GB each drive)and create a stripe set with parity through disk administrator. This typically is done for data. This should be used in conjunction with a good backup system. If two drives failed at the same time, you lose the stripe set with parity (only works if only one drive fails. If two fail, must reformat those paritions and restore from backup). Hope this helps.

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theoretical stripset w/parity

by azizhakim In reply to theoretical stripset w/pa ...

Thanx,great insight.my question &tech response made it very clear,more so than the text i am studying--thanx again-aziz

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theoretical stripset w/parity

by msgtray In reply to theoretical stripset w/pa ...

The simple answer to your question to help your understanding of the Microsoft test is this...
The system files (i.e. \Winnt) cannot reside on a stripe set (with or without parity) because the configuration of the stripe set is contained IN the system files. A mirror set, in contrast, takes an accessible drive configuration and duplicates it on another physical disk (hence, the ability to mirror the system partition).
This explanation applies to Microsoft's SOFTWARE implementation of RAID 0, 1, & 5. Please do not confuse these rules with HARDWARE RAID solutions.

The method of installation, by itself, has little relevance on fault tolerance (other than laying the foundation for a planned fault tolerant disk configuration).

Ray

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theoretical stripset w/parity

by azizhakim In reply to theoretical stripset w/pa ...

Thanx,great insight.learned in this 2 days what i have been struggling w/ for a week or two.thanx again--aziz

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theoretical stripset w/parity

by azizhakim In reply to theoretical stripset w/pa ...

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