HDD Components Maker Hoya Describes 22TB and 24TB Hard Drives

Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by bayindirh on Saturday November 07, 2020 @05:26PM (#25020198)

ZFS also periodically re-silvers the disks to keep the FS in top shape. IIRC ZFS tries to re-silver disks when the traffic is low but, it's not always possible.

I bet that the disks is 16+ TB range will be used for colder tiers of the storage. Also, they should be useful in the OST of the LustreFS since the random read storm hits the MDT more severely.

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Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by karamanolev on Saturday November 07, 2020 @06:32PM (#25020886)

A friendly minor correction - a resilver is only when a drive is replaced, the periodic checksum check is a scrub in ZFS parlance.

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Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by magicalhippo on Saturday November 07, 2020 @07:19PM (#25021313)

And the scrub has to be initiated somehow, typically cron job, it's not automatic in ZFS.

Though NAS distributions like TrueNAS/FreeNAS sets this up for you by default.

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Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by bayindirh on Sunday November 08, 2020 @04:14AM (#25024313)

> And the scrub has to be initiated somehow, typically cron job, it's not automatic in ZFS.

The devices were Oracle/Sun ZFS appliances (I tortured a 7320, we liked it & bought a full-out 7420) so, maybe it was set up to scrub/resilver automatically in some cases.

As I've aforementioned, we're more of a Lustre shop and retired the systems some years ago.

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Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by bayindirh on Sunday November 08, 2020 @04:11AM (#25024304)

> A friendly minor correction...

Thank you. I'm no expert in ZFS TBH (We use Lustre much more) but, IIRC, when I was benchmarking the then new Sun Oracle ZFS 7320, I remember it was resilvering the disks after especially torturous loads, at night.

Maybe it was specific to the appliances (Our behemoth 7420 did the same) or, something was wrong. I remember Oracle/Sun guys jokingly asking me whether I succeeded to make it resilver the disks and, hearing it did indeed resilver the disks a dozen times visibly upset them. They've only said that "Pack it up, we need to go".

Fun times, it was.

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Re:HDD Components Maker Hoya Describes 22TB and 24TB Hard Dr... by Fnoord on Tuesday November 10, 2020 @07:53AM (#25045398)

Hmm, if you had to resilver the disks a dozen times, I would assume that is indication of a hardware failure somewhere in the device (perhaps RAM?).

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