K 10
svn:author
V 3
imp
K 8
svn:date
V 27
2017-10-30T03:25:22.934012Z
K 7
svn:log
V 537
Send IDLE IMMEDIATE for warm boot.

We must send either an IDLE IMMEDIATE or a STANDBY IMMEDIATE to drives
on warm boot so their SMART and other volatile data is
persisted. However, for a warm boot we don't want to send STANDBY
IMMEDIATE to some spinning drives because they will spin down. If
there's a lot of these drives on the system, that can cause a
thundering herd problem at startup time (that in extreme cases causes
timeout in device discovery).

Sponsored by: Netflix
Differential Revision: https://reviews.freebsd.org/D12811

END