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Archived Disk Articles
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13 Oct 2008
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Sun Blueprint: Using RAID 6 on the Sun StorageTek 6140 Array [20444]
Increasing Reliability for Storage Arrays
Many users have chosen either RAID 5 or RAID 1+0 for their data storage needs. While both of these RAID algorithms provide increased data availability, they are not without their disadvantages:
- RAID 5 - only able to sustain a single drive failure.
- RAID 1+0 - 50% of the available storage capacity is used for mirroring
These disadvantages are exacerbated as disk drive capacity increases. With larger disks, the RAID 1+0 implementation becomes increasingly costly. A blueprint by Said A. Syed describes using Raid 6 on the Sun StorageTek 6140 Array and concludes,
"RAID 6 provides protection against two consecutive drive failures by using two independent parity calculations. Sun Microsystems takes advantage of the better performing P+Q algorithm implementation of RAID 6 and uses dedicated processors for RAID computations on intelligent RAID controllers in the StorageTek 6140 arrays for improved performance.
RAID 6 offers highly available storage for applications and implementations requiring extremely high fault tolerance while keeping cost down and performance at an acceptable level during normal circumstances. If best practices are followed, a RAID 6 disk group is capable of performing at rates very close to RAID 5 with a slightly higher cost. RAID 6 is also capable of providing reliability close to RAID 1+0 at a fraction of the cost. "
(Get More Information . .)
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15 Sep 2008
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New 450GB 15K SAS Drives [20585]
For the Sun StorageTek 2540, 2530, 2510, and 2501 Arrays
The Sun StorageTek 2500 Series of Arrays is adding a 450GB 15K SAS Drive to the portfolio. Existing customers can add the new drive to their current systems. New customers can create custom configurations with the new drives.
(Get More Information . .)
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14 Jul 2008
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Storage J4200, J4400 and J4500 Arrays [20289]
Key Features
The open Sun storage J4000 array family combines high performance hardware and open source software. The J4000 family supports Solaris, Red Hat, Linux, Suse Linux, and Windows.
- Sun Storage J4200 array - 2 RUs, up to 12 disks - low entry point
- Sun Storage J4400 array - 4 RUs, up to 24 disks - best price performance
- Sun Storage J4500 array - 4 RUs, up to 48 SATA disks - high density
Learn about the rest of the features.
(Get More Information . .)
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