Date: Thu, 26 Nov 2020 00:10:40 +0000 From: tech-lists <tech-lists@zyxst.net> To: freebsd-current@freebsd.org Subject: possible usb3-connected hard drive spin down causing lag Message-ID: <X77ygGTS09S91bTC@rpi4.local>
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[-- Attachment #1 --] 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 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 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 "woken up", inferaction is quick, as expected. thanks, -- J. [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- iQIzBAABCAAdFiEE8n3tWhxW11Ccvv9/s8o7QhFzNAUFAl++8nYACgkQs8o7QhFz NAXGCBAAn9ArO+8vJM7rPsUEm1wZQeYTI9Xdxe56hOj9/MyvhH/NvbgS6MQUL0J4 LhgXlZGtPWMIK4oucE8vWUn8mA7pXB5pdlxy0ZjJEvK8iFaHk+FUkg6S/S5cRX/L tSj4btKaPRedxDn7af8EMZkVKHuqWdCP1tpvKl5exacS7gSPDS4Q0RLjsYg8Asog K7ftK9jggoGnIK+Yiya+ovvbl07I/jrj9PKhGjhzOo3n/USfsEBdck6SuW4H9+Ct YZaVkN7IcIVWuLNSkNbyTm3GP53S+IIjqNiL29OXSdgAB52UZ2WNs6tDtGY93Ee/ 4xBKlsc10Sje4zL/hsRyaIyjlxsV5WKnuOGzX/iWoIwCCGbj23UDfnWZLQjQUAeg YkIPQax9UmZ1S6rJoQo269XHdyc31kModA1BvTKxYY2lfjxSkhmyLgRC30lLtz9w Pb/OmttarG+e5F4YkwEd6cGBon7Yvi9oty9DqVPCGOQ5swljSiYAJvqO6OETDVA5 Jv9G7IhXXp06LQhER4QGGl5n76+Fnxfvn11Wdt/sTKlXPpCLgyLe7jsUSQlRoUJd hEO4Ve5pB88rLt2/liF9Q4rCD59uXMnvZsjSQUrvB4OgGwnlS0a5FiUz6rO+2UdF T3VCxJaxUWiWHu33IhUlWfDWYYXwM0YVX0Dwo/AWCqXR+IBh9Uk= =pUhE -----END PGP SIGNATURE-----
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