View Full Version : Question about RAID 5
Ladogaboy
07-13-2002, 02:25 PM
Now, if you are running a RAID 5 array, you lose space equivalent to one of the drives on the array, right? So, say, 3, 120 gigs in RAID 5 would = 240 gigs of space and 4, 120 gig drives would equal 360 gigs of space, right?
Sorry, I'm just making sure I got this right...
NuTs62
07-13-2002, 02:39 PM
Originally posted by Ladogaboy
Now, if you are running a RAID 5 array, you lose space equivalent to one of the drives on the array, right? So, say, 3, 120 gigs in RAID 5 would = 240 gigs of space and 4, 120 gig drives would equal 360 gigs of space, right?
Sorry, I'm just making sure I got this right...
yes indeedy! thats what i have running =)
NuTs62
07-13-2002, 02:44 PM
oh yeah.. forgot to mention.. 3 120GB drives in a RAID 5 setup.. formatting under NTFS.. WinXP shows up as 223GB
Ladogaboy
07-13-2002, 02:53 PM
Originally posted by NuTs62
oh yeah.. forgot to mention.. 3 120GB drives in a RAID 5 setup.. formatting under NTFS.. WinXP shows up as 223GB
:hmm: :confused:
NuTs62
07-13-2002, 02:58 PM
Originally posted by Ladogaboy
:hmm: :confused:
Capacity: 239,988,961,280 bytes. = 223 GB
Ladogaboy
07-14-2002, 10:43 PM
Originally posted by NuTs62
Capacity: 239,988,961,280 bytes. = 223 GB
Yes, I know, but why is it only registering as 223 gigs? Or are they just being stupid and listing a gigabyte as 1,000 megabytes when it is actually 1,024? Ahhh, yeah, just being stupid...
NuTs62
07-14-2002, 11:32 PM
mmm.. all that is too much to Ghost.. :)
Jeffbx
07-15-2002, 04:47 AM
Originally posted by chosenfool
whats safeguarding that drive? you still have to diagnose the failed drive.
)
The point is that in a single drive failure, there is no data loss, and with a hot swap system, there is no downtime to replace the failed drive. (You don't dignose a failed drive - you replace it.)
But I agree - it's overkill for a home user, unless you have a ton of money that you need to spend. I don't think there's even RAID5 controllers available for IDE yet, are there?
Ladogaboy
07-15-2002, 12:15 PM
Well, I back up all of my files on CD-R anyway, but could you imagine transfering 200 gigs of information from a CD drive? :eek:
NuTs62
07-15-2002, 04:45 PM
Originally posted by Jeffbx
But I agree - it's overkill for a home user, unless you have a ton of money that you need to spend. I don't think there's even RAID5 controllers available for IDE yet, are there?
I'm using a RAID controller that can do all the RAIDS. RAID 0, 1, 5, 10, etc... :) And its for IDE.
NuTs62
07-15-2002, 04:46 PM
Originally posted by Ladogaboy
Well, I back up all of my files on CD-R anyway, but could you imagine transfering 200 gigs of information from a CD drive? :eek:
i'm too lazy to backup all my data.. i'm just hoping that this RAID 5 will protect my data a bit.. Right now, I have about 450 Gigs in this system (about 75gb free), and I don't think that'd be too fun to back all this crap up.
Ladogaboy
07-15-2002, 09:02 PM
Originally posted by NuTs62
i'm too lazy to backup all my data.. i'm just hoping that this RAID 5 will protect my data a bit.. Right now, I have about 450 Gigs in this system (about 75gb free), and I don't think that'd be too fun to back all this crap up.
Back dat crap up! ;)
NuTs62
07-16-2002, 01:53 AM
Originally posted by Ladogaboy
Back dat crap up! ;)
Give me the like 500 CD's necessary to back it all up! Thats just far too time consuming! Much simpler to buy a new HD, and transfer. Unless of course I get a DVD-RW.. mmm, that would be mucho better!
Jeffbx
07-16-2002, 04:41 AM
Originally posted by NuTs62
I'm using a RAID controller that can do all the RAIDS. RAID 0, 1, 5, 10, etc... :) And its for IDE.
What kind is it, and how much was it?
Don't worry about backing your stuff up - no one really does it until after they have a massive data loss. Got|PowerSurge? :P
Doesn't RAID 5 write the same data to 5 hard drives? I think RAID 1 is enough for almost any user. (Although at work we have a RAID 5 setup and tape backups every night.
NuTs62
07-16-2002, 04:05 PM
Originally posted by Jeffbx
What kind is it, and how much was it?
Don't worry about backing your stuff up - no one really does it until after they have a massive data loss. Got|PowerSurge? :P
Its listed in my signature. Made by a company called 3Ware. Costed a couple hundred for a 4port ATA100. Yah, which reminds me, I still gotta buy me a UPS system.
NuTs62
07-16-2002, 04:07 PM
Originally posted by i6s1
Doesn't RAID 5 write the same data to 5 hard drives? I think RAID 1 is enough for almost any user. (Although at work we have a RAID 5 setup and tape backups every night.
nope. RAID 5 requires at least 3 drives. What it does, from my understanding is.. Bits of data are stored across two drives, and in a compressed format on the third drive. It alternates, so every drive has compressed and uncompressed data. When one drive goes down, the compressed data can be used to recreate that one drive. But I think if 2 drives die, ouch! And of course, its preferable that you have 3 drives of the same size. Otherwise, the smallest size will be used.
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