If there is a way to tell this disk is 4K sectored drive, SD can inform
ZFS to make all I/O 4K aligned.
We will have those functions you mentioned in SD to support flash disk
very soon. Will not be hard to support this hard drive in that manner as
well.
Anyone has a disk for us to try?
Roger
δΊ 2010-3-23 18:03, Richard L. Hamilton ει:
I see no mention of ata(7d) (Intel?) or dad(7d) (SPARC?) drivers
(or perhaps more usefully, sata(7d)), despite seeing info that
there will be 4k sector (S)ATA drives.
Is that because
http://www.idema.org/_smartsite/modules/local/data_file/show_file.php?cmd=download&data_file_id=1261
apparently says that such devices will behave in a backward
compatible manner (but with a performance hit for non 4k aligned
logical sectors due to read-modify-write)?
Anyway, I'd suppose that if a 4k device is detected, whether SCSI or (S)ATA
(or anything else applicable), performance would be best if both
partitions and filesystem blocks were constrained to 4k alignment.
So maybe the (S)ATA driver(s) (and/or format) do have some role
to play in that case?
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