May 23, 201313 yr I just got in 2 3tb sv35 seagate drives. I wanted to know the best way to disable head parking or apm. I was thinking adding one of these to my go file: hdparm -B 255 /dev/sdX Or hdparm -B 254 /dev/sdX Or hdparm -Z 0 /dev/sdX Im not sure which one to use. -Z Disable Seagate auto-powersaving mode -B Set Advanced Power Management setting (1-255) Seagate has -B set at 128 out of the box. Both drives where made in 2013, but they have diff firmware(no updates for either), one from china and one from thailand. And incase anyone wants to know, they are about 50% faster on preclear than wd reds, and run warm, red are 32c these video versions are 39c.
May 23, 201313 yr I just got in 2 3tb sv35 seagate drives. I wanted to know the best way to disable head parking or apm. I was thinking adding one of these to my go file: hdparm -B 255 /dev/sdX Or hdparm -B 254 /dev/sdX Or hdparm -Z 0 /dev/sdX Im not sure which one to use. None of the above. /dev/sd? assignments can change from one boot to the next, so you very well may be applying a setting to the wrong drive. As to your stated question, I don't know if it's a good idea to mess with head parking parameters unless you have some evidence that says it's needed in those particular models.
May 23, 201313 yr Author Im trying to avoid something called the seagate chirp of death. It happens with the power savings is set very aggressively. its a common problem for barracuda drives, but i dont know about these sv35 cousins. Its kinda like the idle3 fix for wd green drives that park the heads every 8 seconds.
May 23, 201313 yr You can avoid the /dev/sd assignment issue by referencing the disk by ID, which won't change between reboots. Something like: hdparm -B 255 /dev/disk/by-id/ata-ST9900DL003-XXXXX_YYYYY I do this in my go script for a frequently accessed non-array drive (an old drive with far too many park cycles already). My seagates all start with "ata-ST".
May 30, 201313 yr Author Well on my samsungs hdparm -B 254 works On my seagates it just throws a "failed: Input/output error" with either _b 254,255 or -Z. "hdparm -B /dev/disk/by-id/ata-ST3000VX000-1CU166_Z1F22Z4F /dev/disk/by-id/ata-ST3000VX000-1CU166_Z1F22Z4F: APM_level = not supported"
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