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Disaster recovery

Posted on 2000-02-28
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Last Modified: 2013-12-28
I have a windows 98 Se installed at home. I would like my hard disk to be mirrored, so that I have an updated backup of my hard drive all the time.

I would like to know the following :
Do the hard drives have to of same make and capacity ?
How do I intiate the mirroring ?
If one of the hard drives fail will the other hard drive take over automatically ?
How reliable is  this ?
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Question by:farhan062997
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foulc earned 50 total points
ID: 2567913
To mirror your harddisk , is to make a copy of a hardrive to another, that can be done always, but not to make two harddisk in one body. They can have different capacity. And if one fail , other will still usable, if not, what is the use for mirroring?
But mirroring takes long time , you can just make mirroring while you need to , but not at everytime, that is if you mirror the harddisk at 3:00, and you make some file arrangement at 4, then you can only get the information at three if your computer down at five!

I think its reliablity is relatively low, because it is time consuming, and mirrored harddisk will not take the place of the broken one automatically. If you want to take the advantage of data protecting , or fault tolerance, you may use WinNT disk management, there is an option , called Fault Tolerance , drive offset with parity check ( or something like that , I forgot the exact name ) Then if one of the harddisk failed, you can still use the drive because data is protected by odd parity, without manual setting.( But if there is a fire, then you can restore nothing by parity check! )
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Author Comment

by:farhan062997
ID: 2568001
I need something for Windows 98, will WinNT disk Management work for 98 ?
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Expert Comment

by:trekie1
ID: 2571232
foulc ..
you should change your answer to a comment , the person wanted a few answers rather than a simple opinion...

foulc is right on one count ,the hard drives dont have to be the same size and brand, just as long as the 2nd drive is large enough to hold the contents of the one to be mirrored,, in other words say you have a 6 gig harddrive and only 3 gigs of info to be mirrored then a 3.2 gig or so would be ok
and the question ,will the other drive take over automaticly   is no...the second drive will have to be installed as a slave or secondary master and if the master should fail ,then the second drive will have to be changed to master( but thats not hard to do )
most comps have the option to boot up to the secondary harddrive however...( a simple change in the setup/bios

and question how do I intiate the mirroring ...? that should be explaned in the directions of the program you use such as DISK COPY..... James
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