Quote:
Originally Posted by shipon_97
Friends ,
I wanna configure RAID 1 within TWO HDD in RHEL-5 during installation moment .
I have the following questions regarding software raid vs hardware raid :
1) What is the basic difference between hardware and software raid
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Hardware RAID
A hardware RAID implementation usually takes the form of a specialized disk controller card. The card performs all RAID-related functions and directly controls the individual drives in the arrays attached directly to it. With the proper driver, the arrays managed by a hardware RAID card appear to the host operating system just as if they were regular disk drives.
Most RAID controller cards work with SCSI drives, although there are some IDE-based RAID controllers as well.
Software RAID
Software RAID is simply RAID implemented as kernel- or driver-level software for a particular operating system. As such, it provides more flexibility in terms of hardware support — as long as the hardware is supported by the operating system, RAID arrays can be configured and deployed
Quote:
Originally Posted by shipon_97
2) In software raid , If I use two HDD as RAID1 , then if one HDD is failed , can I boot it from another HDD ?
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INMHO, this is not desired. RAID 1 is for mirroring disks. If in case you want to clone a disk, I recommend use of
dd commands as :-
Code:
dd if=/dev/sda of=/dev/sdb
In this case /dev/sdb will become a clone of /dev/sda.
Quote:
Originally Posted by shipon_97
3)In software RAID , Between two HDD , If One HDD is failed then if I remove bad HDD and add a spare HDD then is it automatically synchronized with FIRST HDD ?
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Yes, this is possible.
Quote:
Originally Posted by shipon_97
4) In software raid is it possible to keep '/boot' partition in two HDD (I use 2 HDD as RAID1) as separate partition ?
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Yes, we can configure RAID1 for /boot.
Quote:
Originally Posted by shipon_97
5) Finally is there any documnets or sites where I get software raid configuration during INSTALLATION moment in using GRAPHICAL mode , plz give me the address.
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I can help you in
software RAID through the command line part
after installation. It is not too difficult.
I never tried any graphical tool, nor at the time of installation.
Hope this helps.
