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Block 512 bytes ou 4k?
We have an EQL4100 with 24 disks.
The volume configuration uses blocks of 512bytes, but there is an option of blocks of 4k.
If I set up a volume with a 4K block, would that help performance?
Thanks.
Unsolved
79 Posts
0
866
We have an EQL4100 with 24 disks.
The volume configuration uses blocks of 512bytes, but there is an option of blocks of 4k.
If I set up a volume with a 4K block, would that help performance?
Thanks.
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dwilliam62
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April 19th, 2020 22:00
Hello,
re: 4k vs 512b. No. The array performance is not impacted by using 4K. Since the back end drives are still 512b. The array presents the logical LUN as a 4K blocksize and translate that to 512b on the backend.
It's possible that 4K at the filesystem might have some efficiency improvements. But our standard recommendation is set the NTFS cluster size to 64K. Typical values are 4K to 8K. This aligns writes on the 64K stripe size the array uses. This is much more efficient on writes vs. <64K.
Also note, not all filesystems support 4K
Regards,
Don