Gentoo Archives: gentoo-user

From: Adam Carter <adamcarter3@×××××.com>
To: gentoo-user@l.g.o
Subject: Re: [gentoo-user] Re: hdparm + Western Digital Green "idle3"
Date: Tue, 28 Aug 2012 00:29:18
Message-Id: CAC=wYCGgUoM_JyttJg3aSD0ZPyNY2tBqFGebgYaF=wSEM5Wkfw@mail.gmail.com
In Reply to: [gentoo-user] Re: hdparm + Western Digital Green "idle3" by Nikos Chantziaras
1 >> I've just checked out the man page for hdparm. There I noticed the
2 >> new -J switch. It reads:
3 >>
4 >>> Get/set the Western Digital (WD) Green Drive's "idle3" timeout
5 >>> value. This timeout controls how often the drive parks its heads and
6 >>> enters a low power consumption state. The factory default is eight
7 >>> (8) seconds, which is a very poor choice for use with Linux. Leaving
8 >>> it at the default will result in hundreds of thousands of head
9 >>> load/unload cycles in a very short period of time. The drive
10 >>> mechanism is only rated for 300,000 to 1,000,000 cycles, so leaving
11 >>> it at the default could result in premature failure,
12
13 # smartctl -a /dev/sda | grep Load_Cycle_Count
14 193 Load_Cycle_Count 0x0032 001 001 000 Old_age
15 Always - 920472
16
17 So i'm at 920K - has anyone tried -J? Since it returns this (below) I
18 think i'll just leave it drive with the 8 second timer. The drive is
19 mirrored.
20
21 Use of -J is EXTREMELY DANGEROUS.
22 This implementation is not as thorough as the official WDIDLE3.EXE.
23 Use at your own risk!
24 Please also supply the --please-destroy-my-drive flag if you really want this.
25 Program aborted.