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тАО08-27-2003 03:50 AM
тАО08-27-2003 03:50 AM
Hi Forummers
I'm looking at what's termed RAID 53 as an alternative to RAID 3
[Though I'm told that "RAID 03" would have been a better name for RAID 53,
because it's implemented as a striped array whose segments are RAID 3 arrays]
QUESTION 1]
All disc spindles have to be synchronised - right?
QUESTION 2]
Can someone put this info into English for me?
"Byte striping results in poor utilization of formatted capacity"
What?
I think it means that stripes are a fixed size so you can't always fill a stripe,
but that sounds too simple
Enlighten me !!
Mike
Don't get mad - get naked
BTW: If you owe Randall any points get 'em assigned now
He's only a midges d*ck away from Olympus
I'm looking at what's termed RAID 53 as an alternative to RAID 3
[Though I'm told that "RAID 03" would have been a better name for RAID 53,
because it's implemented as a striped array whose segments are RAID 3 arrays]
QUESTION 1]
All disc spindles have to be synchronised - right?
QUESTION 2]
Can someone put this info into English for me?
"Byte striping results in poor utilization of formatted capacity"
What?
I think it means that stripes are a fixed size so you can't always fill a stripe,
but that sounds too simple
Enlighten me !!
Mike
Don't get mad - get naked
BTW: If you owe Randall any points get 'em assigned now
He's only a midges d*ck away from Olympus
Don't get mad - get naked
Solved! Go to Solution.
3 REPLIES 3
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тАО08-27-2003 09:21 AM
тАО08-27-2003 09:21 AM
Solution
Mike,
OK, I'll take pity on you since nobody seems to want to talk to you (what did you do to offend everyone, anyway?).
Here's a pretty good breakdown on RAID 53:
http://www.acnc.com/04_01_53.html
Also check the same site's description of RAID 3:
http://www.acnc.com/04_01_03.html
As to your specific questions,
1] right
2] I've found no definitive answer so I'll go with your theory (at least for the moment).
Hope this helps some,
Pete
Pete
OK, I'll take pity on you since nobody seems to want to talk to you (what did you do to offend everyone, anyway?).
Here's a pretty good breakdown on RAID 53:
http://www.acnc.com/04_01_53.html
Also check the same site's description of RAID 3:
http://www.acnc.com/04_01_03.html
As to your specific questions,
1] right
2] I've found no definitive answer so I'll go with your theory (at least for the moment).
Hope this helps some,
Pete
Pete
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тАО08-27-2003 09:41 AM
тАО08-27-2003 09:41 AM
Re: RAID 53 versus 3
This touches on your 2d question (see the Storage Efficiency section):
http://www.pcguide.com/ref/hdd/perf/raid/levels/multLevel03-c.html
Here's a quote from the previously mentioned reference to RAID 3:
"Due to the restriction of having to write to all disks, the amount of actual disk space consumed is always a multiple of the disks' block size times the number of disks in the array. This can lead to wastage of space."
That's almost like English!
Pete
Pete
http://www.pcguide.com/ref/hdd/perf/raid/levels/multLevel03-c.html
Here's a quote from the previously mentioned reference to RAID 3:
"Due to the restriction of having to write to all disks, the amount of actual disk space consumed is always a multiple of the disks' block size times the number of disks in the array. This can lead to wastage of space."
That's almost like English!
Pete
Pete
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тАО08-28-2003 12:06 AM
тАО08-28-2003 12:06 AM
Re: RAID 53 versus 3
Pete:
Works for me [Bill Mac (TM)]
Me & the client have decided that RAID 3 is the way to go because there isn't enough 'performance boost' on 53 to justify the increase in cost
All:
Hmmm...
I'm just considering how many points to award to that Randall character...
http://forums.itrc.hp.com/cm/UserProfile/1,,CA13182!1,00.html
He's on 19,991
He needs 9 points
He's answered my question
But on the other hand 28 of his points are for Micro$lop
What the heck
Congrats Pete...
I'm proud to announce that you're moving North across the Med & setting up your own kebab shop
I'll let someone else start the thread
Mike
Don't get mad - get naked
[Well they did in the original Olympics - but no female contestants unfortunately]
Works for me [Bill Mac (TM)]
Me & the client have decided that RAID 3 is the way to go because there isn't enough 'performance boost' on 53 to justify the increase in cost
All:
Hmmm...
I'm just considering how many points to award to that Randall character...
http://forums.itrc.hp.com/cm/UserProfile/1,,CA13182!1,00.html
He's on 19,991
He needs 9 points
He's answered my question
But on the other hand 28 of his points are for Micro$lop
What the heck
Congrats Pete...
I'm proud to announce that you're moving North across the Med & setting up your own kebab shop
I'll let someone else start the thread
Mike
Don't get mad - get naked
[Well they did in the original Olympics - but no female contestants unfortunately]
Don't get mad - get naked
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