Messages in this thread | | | Date | Fri, 13 Feb 2004 20:44:45 GMT | From | John Bradford <> | Subject | Re: File system performance, hardware performance, ext3, 3ware RAID1, etc. |
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> And the software-visible 512-byte blocking factor just has to be > _incredibly_ painful on a hardware level, and I'd be surprised if there > aren't disks out there already where the actual real physical block-size > is bigger. Which means that I would expect a lot of drives to internally > do read-modify-write cycles for small writes. > > And especially in a market where density is often more important than pure > speed, I'd expect hw manufacturers to have a _huge_ bias towards big > blocks on the platter, in order to avoid having to have lots of > inter-sector gaps etc.
Since drives don't generally do defect re-allocation on read, only on write, large blocks at the hardware level cause difficulties with defect management, so hardware 512 byte sectors are still common :-(.
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