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Re: raid and ide [Archive] - ForumsHQ
Posted: Sat Feb 08, 2003 10:01 pm
by NIN
--Toasted Items:
AMD 1800+ From unlocking
??
i've toasted 2 amd 1800 xps!
they burn like gasoline!
Re: raid and ide [Archive] - ForumsHQ
Posted: Mon Feb 10, 2003 12:05 pm
by Hanover Fist
Actually in a RAID 5 all drives do not need to be the same size, however, you will only yield a RAID of the lowest common denominator.
EXMP: 10GB 10GB 20GB will yield a 20GB Raid 5.
10GB 20GB 20GB will ALSO yield a 20GB RAID.
16GB 16GB 16GB will yield a 32GB RAID.
In the first example, you have 3 drives not all equal in size.
As the smallest drive is only 10GB you will only be able to actually use 10GB from the 20GB drive in the RAID 5. You can create other containers from the remaining 10GB left over on this drive, however, I would not recomend doing so, as it this 10GB space would have no redundancy or recoverability in the event that drive failed.
In the second example, you again are limited on the size of your RAID 5 based on the 10GB drive, but, you can create a 10GB mirror (RAID 1) on the additional space on the remaining 2 drives.
The third example is a standard RAID 5.
In addition, most RAID is usually SCSI based and is best setup with a hot spare that can be designated for automated recovery purposes in the event of a HD failure, thereby increasing the redundancy of the RAID. You are not required to create ONE RAID 5 with all of the space you have available, this is the beautiful part of a HW RAID solution, the OS generally knows nothing of the physcalilty of the drives, so any number of configurations is possible.
I have not looked that deeply into IDE RAID and have only used it for Mirroring.
Oppps, forgot there is also Fiberchannel RAID, but thats some expensive shit. Usually found in cluster systems and large external terrabyte arrays.
I will also add that all of the above is based on a Hardware RAID and not on standard MS or NW software RAID.
BTW, RAID stands for Redundant Array of Inexpensive Disk.
There are also RAID 50 and 70 now.
Hanover Fist
Re: raid and ide [Archive] - ForumsHQ
Posted: Mon Feb 10, 2003 12:44 pm
by Speed
EXMP: 10GB 10GB 20GB will yield a 20GB Raid 5.
10GB 20GB 20GB will ALSO yield a 20GB RAID.
16GB 16GB 16GB will yield a 32GB RAID.
10/14 hours of light will yield 4 ounces.
8/16 hours of light will also yield 4 ounces.
12/12 hours of light will yield 6 ounces.
Re: raid and ide [Archive] - ForumsHQ
Posted: Tue Feb 11, 2003 1:11 pm
by Hanover Fist
Yes, but only on Wednesdays.
(damn spelling)