USB Disks

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USB Disks

Post by nickmay » Tue Nov 06, 2012 10:17 pm

Hello,

I have just started using zevo ZFS - so a big "thank you" to the people working on it.

The docs for MacZFS - as I possibly inaccurately recollect - are a bit sniffy about using ZFS with USB disks.

Is this an issue with zevo ZFS? I could not find anything obvious in these forums about it - my apologies if I have overlooked something...

Is ZFS usable with SD cards, thumb drives and the like?

kind regards

Nick May
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Re: USB Disks

Post by grahamperrin » Tue Nov 06, 2012 11:01 pm

Here for me: small USB flash drives and larger USB hard disk drives (640 GB portable, 3 TB desktop) seem fine.

Very recently I began using a very small USB flash drive as a cache vdev for the 640 GB portable. Under ZEVO resilience to untimely loss of L2ARC we have an example of ZEVO apparently working well enough after I removed that flash drive without an unmount of the file system of the portable. (Beyond the proof that it works, I probably gain no performance from this class of flash drive as a cache. The thing is so small that I often can't find it or treat it carelessly – like, snugly zipping up the Brenthaven case without realising that I forgot to remove the drive from the MacBook Pro. Note to self: slip the flash drive inside the rubber case of the hard drive.)

As you're a newcomer, welcome :-) and a hint: if you have not already done so, please apply the update to 1.1.1.
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Re: USB Disks

Post by nickmay » Wed Nov 07, 2012 8:44 am

Thanks very much for your insights - and also the tip about updating. I had installed recently so thought I had the latest, but a quick trip to the preference pane shows I was still at 1.1.

Nick
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Re: USB Disks

Post by si-ghan-bi » Wed Nov 07, 2012 11:22 am

grahamperrin wrote:I probably gain no performance from this class of flash drive as a cache.


I wanted to test it but bonnie++ complains I don't have large file support. How did you solve the issue?
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cross reference

Post by grahamperrin » Wed Nov 07, 2012 12:46 pm

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