我使用三星光盘的旋转和 APM 设置播放，现在它们旋转速度减慢了每一分钟。我想禁用它，但它似乎不接受任何旋转时间或 APM 值。什么都不起作用，一切都一样。
请帮忙指定哪些值适合它。我不想要完全停止旋转。
/dev/sda:
ATA device, with non-removable media
Model Number: SAMSUNG HD154UI
Serial Number: S1Y6J1KZ206527
Firmware Revision: 1AG01118
Standards:
Used: ATA-8-ACS revision 3b
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 2930277168
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 1430799 MBytes
device size with M = 1000*1000: 1500301 MBytes (1500 GB)
cache/buffer size = unknown
Capabilities:
LBA, IORDY(can be disabled)
Queue depth: 32
Standby timer values: spec'd by Standard, no device specific minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: 60
Recommended acoustic management value: 254, current value: 0
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 udma7
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
* Advanced Power Management feature set
Power-Up In Standby feature set
* SET_FEATURES required to spinup after power up
SET_MAX security extension
Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
Media Card Pass-Through
* General Purpose Logging feature set
* 64-bit World wide name
* WRITE_UNCORRECTABLE_EXT command
* {READ,WRITE}_DMA_EXT_GPL commands
* Segmented DOWNLOAD_MICROCODE
* Gen1 signaling speed (1.5Gb/s)
* Gen2 signaling speed (3.0Gb/s)
* Native Command Queueing (NCQ)
* Host-initiated interface power management
* Phy event counters
* NCQ priority information
DMA Setup Auto-Activate optimization
Device-initiated interface power management
* Software settings preservation
* SMART Command Transport (SCT) feature set
* SCT Long Sector Access (AC1)
* SCT LBA Segment Access (AC2)
* SCT Error Recovery Control (AC3)
* SCT Features Control (AC4)
* SCT Data Tables (AC5)
Security:
Master password revision code = 65534
supported
not enabled
not locked
frozen
not expired: security count
supported: enhanced erase
326min for SECURITY ERASE UNIT. 326min for ENHANCED SECURITY ERASE UNIT.
Logical Unit WWN Device Identifier: 50024e900300cca3
NAA : 5
IEEE OUI : 0024e9
Unique ID : 00300cca3
Checksum: correct
我有一张同样的光盘，但我没有“调整”，它不旋转。但我不知道从哪里读取设置。hdparm 只显示以下内容：
Advanced power management level: 60
Recommended acoustic management value: 254, current value: 0
编辑：问题似乎出在 RHEL6 中的调整守护进程上。它太过激进，我关闭了磁盘调整，看来它们不再旋转了。
答案1
你可以尝试：
hdparm -B 255 /dev/sda
如果支持的话，它应该在驱动器上完全禁用高级电源管理。