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тАО01-09-2006 08:57 PM
тАО01-09-2006 08:57 PM
hi i have a raid 5 aray mad up of 3 146.8 drives will creating 2 partitions on the array in windows it slow down read write performance
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3 REPLIES 3
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тАО01-11-2006 03:15 AM
тАО01-11-2006 03:15 AM
Re: daid 5 partition speed
This is true, it will be slower than a single drive on a standard controller. THere is processing involve to construct the array each write.
Hot Swap Hard Drives
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тАО01-11-2006 03:45 AM
тАО01-11-2006 03:45 AM
Re: daid 5 partition speed
I wouldn't be too concerned. Both partitions will be in the same Raid 5 array. If you had two databases and both wrote to the separate partitions then I might suggest a different approach.
Scott
Scott
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тАО01-11-2006 04:21 AM
тАО01-11-2006 04:21 AM
Solution
Hi Justin,
This is normal for RAID 5 array. This is because, I/O will be waiting till the parity get generated & written to the disk.
You can boost the performance by enabling Writeback & read ahead feature.
You should have a BBU ( Battery Backup Unit) Installed on RAID Controller for enabling Write back. - Which will do the writing later. Otherwise data corruption may happen, if power fails. You can increase the performance of RAID array by increasing the cache on RAID Controller & by splitting the disks through multiple channels, if you have multiple channel RAID Controller.
Regards,
Shameer
This is normal for RAID 5 array. This is because, I/O will be waiting till the parity get generated & written to the disk.
You can boost the performance by enabling Writeback & read ahead feature.
You should have a BBU ( Battery Backup Unit) Installed on RAID Controller for enabling Write back. - Which will do the writing later. Otherwise data corruption may happen, if power fails. You can increase the performance of RAID array by increasing the cache on RAID Controller & by splitting the disks through multiple channels, if you have multiple channel RAID Controller.
Regards,
Shameer
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