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Seagate Backup Plus Slim External USB 3.0 2TB Hard Drive Review

Adaptec AAA-UDMA RAID Controller

Adaptec AAA-UDMA RAID Controller - PCSTATS
Abstract: The controller is the AAA-UDMA, a four-channel UDMA/66 RAID controller supporting up to four hard drives in RAID 0, RAID 1, RAID 0/1, and RAID 5 configurations.
Filed under: Servers Published:  Author: 
External Mfg. Website: Adaptec Mar 30 2001   D. Dee  
Home > Reviews > Servers > Adaptec AAA-UDMA

CI/O software

Of course, this isn't a very realistic example, but it's a possibility. A more logical example with four drives would be a three-drive RAID 5 array with the fourth drive as a spare. The CI/O software has an activity that tests all spare drives at 2:00 AM daily by default, so you can rest assured that the spares will most likely work should a drive in the array fail. You can verify the integrity of an array any time you want, but it will take a long while with large arrays- about the same time as it took to initialize the array. Reconstructing an array with a failed drive is also easy, and you can schedule such operations if necessary.
 
 Lastly, you can pause the I/O on the array, which can give you pseudo-hot swap ability if you have removable drives. Unfortunately, the AAA-UDMA doesn't support true hot swapping, SAF-TE enclosures (since they're external), or S.M.A.R.T. functionality. If you need any of that mission critical type stuff, you'll have to get a SCSI RAID controller.







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Contents of Article: Adaptec AAA-UDMA
 Pg 1.  Adaptec AAA-UDMA RAID Controller
 Pg 2.  A little about RAID
 Pg 3.  Initialization time for the array
 Pg 4.  The full specs
 Pg 5.  Three Drives improve performance
 Pg 6.  RAID 0 Performance
 Pg 7.  RAID 1 Performance
 Pg 8.  OS Supported
 Pg 9.  Software management
 Pg 10.  — CI/O software
 Pg 11.  RAID 5 benchmarks
 Pg 12.  processor usage
 Pg 13.  Conclusions

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