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тАО05-25-2001 07:53 AM
тАО05-25-2001 07:53 AM
12H autoraid vs. 30FC
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тАО05-25-2001 10:47 AM
тАО05-25-2001 10:47 AM
Re: 12H autoraid vs. 30FC
I would NOT recommend using an AutoRaid. I would go after the FC30 in a heartbeat. I think you will find MUCH better throughput with the FC.
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тАО05-25-2001 11:12 AM
тАО05-25-2001 11:12 AM
Re: 12H autoraid vs. 30FC
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тАО05-25-2001 11:20 AM
тАО05-25-2001 11:20 AM
Re: 12H autoraid vs. 30FC
If you just want RAID 0/1 then don't bother with the AutoRaid. Get a JBOD (like a Jamaica), make sure you have the mirroring software installed, and do it that way. You'll probably see better performance.
(By the way, if you know Wayne Gierman, tell him I said Hi. If he wonders who I am, tell him I used to work with Stan and Tinker at API.)
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тАО05-25-2001 12:00 PM
тАО05-25-2001 12:00 PM
Re: 12H autoraid vs. 30FC
Wayne sits next me, but the dog is on vacation this week. I'll tell him you send greetings.
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тАО05-26-2001 08:27 AM
тАО05-26-2001 08:27 AM
Re: 12H autoraid vs. 30FC
I would tend to agree with Patrick concerning the performance of a 12H but you can configure a 12H so that its performance is quite good.
1) Create each vg comprised of 2 LUNS of equal size. LUNa should be primary path controller X (alt Y); LUNb should be primary path controller Y (alt X). This utilizes both external SCSI paths for maximum performance.
2) Each lvol should be striped across both LUNS in the volume group for the same reason.
3) As you indicated, run them at about (50-60%) capacity leaving the remainder as unconfigured LUNS. Yes, you waste disk but the performance is worth it.
These steps bring the performance levels up to a comparable level AND don't overlook one of the best features of an AutoRAID - when a drive fails just plug one in and walk away.
My 2 cents, Clay
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тАО05-31-2001 07:47 AM
тАО05-31-2001 07:47 AM
Re: 12H autoraid vs. 30FC
AutoRAID is sold for its automatic control. If you are really worried about performance, don't get it. Get the FC array it using fibre not SCSI.
If you want serviceability and even faster than the FC30 in terms of internal disk busses, get an FC60 in split bus mode.
If that's still not fast enough, get an XP48.
Not big enough, get the 512.
It really depends. My AutoRAIDs have been just fine for developers compilations in terms of speed. Data's protected and they only use it from 9 to 5... perfect.
Later,
Bill
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тАО06-08-2001 10:02 AM
тАО06-08-2001 10:02 AM
Re: 12H autoraid vs. 30FC
using a JBOD would mean the RAID protection will be done by software instead of hardware, where hardware RAID protection is quicker and more reliable.
I agree with Clay that, if properly configured, the 12H can achieve an acceptable performance, but if this is not enough a VA7x00 or an XP48 would be a good (but more expensive) alternative.
Regards,
Mark