Gentoo Archives: gentoo-user

From: "thomas.laton" <thomas.laton@××××××××××.com>
To: "gentoo-user@l.g.o" <gentoo-user@l.g.o>
Subject: [gentoo-user] HDD standby (hdparm/hd-idle) not working with kernel newer than 5.4.72
Date: Tue, 08 Jun 2021 08:06:48
1 On my main system (up-to-date gentoo), I use hd-idle to send my HDDs to standby after a certain amount of time. Disks are SATA HDDs in non-RAID operation - 4xHGST, 1xWDC, 1xSamsung - same behavior for all.
3 Up to kernel version 5.4.72 this worked perfectly fine. If I use any kernel greater than 5.4.* the disks stay up perpetually. I tried with versions 5.6.4, 5.7.6, 5.8.14, 5.11.6 and 5.12.8. Same for hdparm. I think something is accessing the disks (I checked with a command I cannot recall right now).
5 To be clear, if I boot with 5.4.72, everything works as expected. If, on the same system without any changes, I boot into a later kernel - no standby.
7 For context: I use my system as desktop and NAS simultaneously. The disks which are rarely accessed are sent to sleep quickly and the ones accessed more frequently have a longer timeout. Depending on the active/standby state of all disks, I then send the whole system to sleep.