possible usb3-connected hard drive spin down causing lag

[tech-lists]

Hi,

I have a usb3-connected harddrive. dmesg shows this:
[...]
da0: <ADATA HD710 0> Fixed Direct Access SPC-4 SCSI device
[...]

running current-r367806-arm64

I think it might be auto-spinning-down or auto-sleeping. It's

be "green" in that it's usb3 powered.

I have vfs.read_max=128 in /etc/sysctl.conf
zdb has ashift=12

In case it's relevant, the filesystem on the disk is zfs. Once

thanks,
--
J.

making initial interaction lag of 2-3 seconds. Is there a sysctl or something somewhere where I can tell it to never sleep? Or is that something I'd need to contact the manufacturer about? Or is there an alternative strategy like tmpfs. It's not a "green" drive but I guess it might "woken up", inferaction is quick, as expected.

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