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Going from RAID1 to RAID0+1 - Page 3

post #21 of 25
Quote:
Originally Posted by PuffinMyLye View Post
BloodIron_P35-T2RL and I just re-checked and you're right, it does support RAID5. What are the advantages of RAID5 over RAID0+1? Which would be best for my situation? My server is primarily used for media sharing (videos especially) but also as and FTP server.
RAID5 would allow you to have 1.5TB of storage with redudency. If a drive goes bad, the array is out of commission until you replace the drive and it takes time to recalculate. The read times are good but the write times are BAAAAAAAD since it has to do a calculation for every sector. Also, it increase CPU usage.

RAID0+1 allows you to have 1TB storage with better redundency. If a single drive goes bad, you can still use your array. Rebuilding of a RAID0+1 is faster than that of a RAID5. The read and write times are good. There isn't too much overhead either since there is no calculation.

For a dedicated media server with some FTPing.... RAID5 would be a better choice.
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post #22 of 25
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
RAID5 would allow you to have 1.5TB of storage with redudency. If a drive goes bad, the array is out of commission until you replace the drive and it takes time to recalculate. The read times are good but the write times are BAAAAAAAD since it has to do a calculation for every sector. Also, it increase CPU usage.

RAID0+1 allows you to have 1TB storage with better redundency. If a single drive goes bad, you can still use your array. Rebuilding of a RAID0+1 is faster than that of a RAID5. The read and write times are good. There isn't too much overhead either since there is no calculation.

For a dedicated media server with some FTPing.... RAID5 would be a better choice.
With the write times being so bad I'm not too sure about RAID5. I often copy files over to it and they are often big. I'm not worried as much about HD space as I am redundancy and performance. How bad are the writes compared to RAID0+1?
post #23 of 25
Quote:
Originally Posted by PuffinMyLye View Post
With the write times being so bad I'm not too sure about RAID5. I often copy files over to it and they are often big. How bad are the writes compared to RAID0+1?
Dman mentioned 15MB/s....
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post #24 of 25
Thread Starter 
Quote:
Originally Posted by DuckieHo View Post
Dman mentioned 15MB/s....
Compared to what for RAID0+1 though?
post #25 of 25
a 4 drive 0+1 is comparible to a 2 drive raid 0 which is semi comparable to twice as fast as a single drive.
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compy jr
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