4K pages probably used to be too large

By: Etienne Lorrain (etienne_lorrain.delete@this.yahoo.fr), May 6, 2021 12:08 am
Room: Moderated Discussions
wumpus (wumpus.delete@this.lost.in.a.hole) on May 5, 2021 9:06 am wrote:
> Even modern disk drives use 4k pages, although I'm sure that has more to do with newer ECC
> algorithms (and the need for their efficiency) than any underlying preference for 4k pages.

I do not think there is any advantage in an "ECC line size" bigger than a very few hundred bytes (and there is disadvantages like latency), the 4 Kb pages of disk drives is due to the FTL, translating the disk LBA to the FLASH address - disk embedded software would like bigger pages to reduce size of the translation table: 1 Terabyte / 4096 = 268435456 descriptors, such descriptor shall contain the FLASH address so around 32 bits, so the table size is 1 Gbyte per Terabyte (expensive).
That is, unless the nVME is a zoned block devices:
https://zonedstorage.io/introduction/zoned-storage/
https://lwn.net/Articles/853308/
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
4K pages probably used to be too largeYuhong Bao2021/05/01 12:01 PM
  HDD seek time isn't freeMark Roulo2021/05/01 01:12 PM
    HDD seek time isn't freeYuhong Bao2021/05/01 01:21 PM
      HDD seek time isn't freeTim Mc2021/05/01 01:42 PM
        HDD seek time isn't freerwessel2021/05/01 01:57 PM
  4K pages probably used to be too largeBen LaHaise2021/05/02 09:45 AM
    VAX was 512 (in 1977) (NT)anonymous22021/05/02 07:36 PM
      FWIW, S/370 offered a choice of 2K and 4K (NT)rwessel2021/05/03 04:09 AM
      DEC's earliest PDP-11 disks were 512 (in 1971)John Yates2021/05/03 12:53 PM
    4K pages probably used to be too largeanon22021/05/03 12:17 AM
      4K pages probably used to be too largeBen LaHaise2021/05/03 04:36 PM
        Morotola 680x0 series page sizesBen LaHaise2021/05/03 04:51 PM
        4K pages probably used to be too largeanon22021/05/03 05:39 PM
          4K pages probably used to be too largeanon22021/05/03 07:51 PM
        4K pages probably used to be too largeYuhong Bao2021/05/03 09:51 PM
      4K pages probably used to be too largewumpus2021/05/05 08:06 AM
        4K pages probably used to be too largeanon22021/05/05 03:04 PM
          4K pages probably used to be too largeChester2021/05/05 05:45 PM
            4K pages probably used to be too largewumpus2021/05/06 08:06 AM
              Phenom TLB bugHeikki Kultala2021/05/06 11:46 AM
                Phenom TLB bugChester2021/05/06 04:29 PM
        4K pages probably used to be too largeEtienne Lorrain2021/05/06 12:08 AM
          4K pages probably used to be too largeJames2021/05/06 01:36 AM
            4K pages probably used to be too largerwessel2021/05/06 08:32 AM
              Reformatting SCSI disk sector sizeDoug S2021/05/06 10:30 AM
        4K pages probably used to be too largeDavid Hess2021/05/11 07:57 AM
  Page size is more complex/nuancedPaul A. Clayton2021/05/08 09:03 AM
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