hdparm命令磁盘管理 hdparm命令提供了一个命令行的接口用于读取和设置IDE或SCSI硬盘参数。 语法 hdparm(选项)(参数) 选项 -a<快取分区>：设定读取文件时，预先存入块区的分区数，若不加上<快取分区>选项，则显示目前的设定； -A<0或1>：启动或关闭读取文件时的快取功能； -c<I/O模式>：设定IDE32位I/O模式； -C：检测IDE硬盘的电源管理模式； -d<0或1>：设定磁盘的DMA模式； -f：将内存缓冲区的数据写入硬盘，并清楚缓冲区； -g：显示硬盘的磁轨，磁头，磁区等参数； -h：显示帮助； -i：显示硬盘的硬件规格信息，这些信息是在开机时由硬盘本身所提供； -I：直接读取硬盘所提供的硬件规格信息； -k<0或1>：重设硬盘时，保留-dmu参数的设定； -K<0或1>：重设硬盘时，保留-APSWXZ参数的设定； -m<磁区数>：设定硬盘多重分区存取的分区数； -n<0或1>：忽略硬盘写入时所发生的错误； -p<PIO模式>：设定硬盘的PIO模式； -P<磁区数>：设定硬盘内部快取的分区数； -q:在执行后续的参数时，不在屏幕上显示任何信息； -r<0或1>:设定硬盘的读写模式； -S<时间>:设定硬盘进入省电模式前的等待时间； -t;评估硬盘的读取效率； -T：平谷硬盘快取的读取效率； -u<0或1>：在硬盘存取时，允许其他中断要求同时执行； -v：显示硬盘的相关设定； -w<0或1>：设定硬盘的写入快取； -X<传输模式>：设定硬盘的传输模式； -y：使IDE硬盘进入省电模式； -Y：使IDE硬盘进入睡眠模式； -Z：关闭某些Seagate硬盘的自动省电功能。
查看硬盘信息如下：
[root@dl] dev # hdparm -I /dev/sdd /dev/sdd: ATA device, with non-removable media Model Number: WDC WD1003FBYX-01Y7B1 Serial Number: WD-WMAW31037763 Firmware Revision: 01.01V02 Transport: Serial, ATA8-AST, SATA 1.0a, SATA II Extensions, SATA Rev 2.5, SATA Rev 2.6, SATA Rev 3.0 Standards: Supported: 8 7 6 5 Likely used: 8 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: 1953525168 Logical/Physical Sector size: 512 bytes device size with M = 1024*1024: 953869 MBytes device size with M = 1000*1000: 1000204 MBytes (1000 GB) cache/buffer size = unknown Nominal Media Rotation Rate: 7200 Capabilities: LBA, IORDY(can be disabled) Queue depth: 32 Standby timer values: spec'd by Standard, with device specific minimum R/W multiple sector transfer: Max = 16 Current = 0 Advanced power management level: 128 DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6 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 * 48-bit Address feature set * Device Configuration Overlay feature set * Mandatory FLUSH_CACHE * FLUSH_CACHE_EXT * SMART error logging * SMART self-test * General Purpose Logging feature set * WRITE_{DMA|MULTIPLE}_FUA_EXT * 64-bit World wide name * IDLE_IMMEDIATE with UNLOAD * WRITE_UNCORRECTABLE_EXT command * {READ,WRITE}_DMA_EXT_GPL commands * Segmented DOWNLOAD_MICROCODE unknown 119[7] * Gen1 signaling speed (1.5Gb/s) * Gen2 signaling speed (3.0Gb/s) * Native Command Queueing (NCQ) * Phy event counters * Idle-Unload when NCQ is active * NCQ priority information DMA Setup Auto-Activate optimization * 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) unknown 206[12] (vendor specific) unknown 206[13] (vendor specific) Security: Master password revision code = 65534 supported not enabled not locked not frozen not expired: security count supported: enhanced erase 168min for SECURITY ERASE UNIT. 168min for ENHANCED SECURITY ERASE UNIT. Logical Unit WWN Device Identifier: 50014ee206d4f4ba NAA : 5 IEEE OUI : 0014ee Unique ID : 206d4f4ba Checksum: correct [root@dl-dns1:Active:In Sync] dev #