hdparm硬盘参数显示和设置

显示硬盘的相关设置 
[root@cnscn ~]# hdparm /dev/sda 
/dev/sda: 
IO_support = 0 (default 16-bit) 
readonly = 0 (off) 
readahead = 256 (on) 
geometry = 19929［柱面数］/255［磁头数］/63［扇区数］, sectors = 320173056［总扇区数］, start = 0［起始扇区数］ 
.显示硬盘的柱面、磁头、扇区数 
[root@cnscn ~]# hdparm -g /dev/sda 
/dev/sda: 
geometry = 19929［柱面数］/255［磁头数］/63［扇区数］, sectors = 320173056［总扇区数］, start = 0［起始扇区数］ 
.评估硬盘的读取效率 
[root@cnscn ~]# hdparm -t /dev/sda 
/dev/sda: 
Timing buffered disk reads: 166 MB in 3.03 seconds = 54.85 MB/sec 
[root@cnscn ~]# hdparm -t /dev/sda 
/dev/sda: 
Timing buffered disk reads: 160 MB in 3.01 seconds = 53.11 MB/sec 
[root@cnscn ~]# hdparm -t /dev/sda 
/dev/sda: 
Timing buffered disk reads: 166 MB in 3.00 seconds = 55.31 MB/sec 
.评估硬盘快取的读取效率 
[root@cnscn ~]# hdparm -T /dev/sda 
/dev/sda: 
Timing cached reads: 3784 MB in 2.00 seconds = 1894.60 MB/sec 
[root@cnscn ~]# hdparm -T /dev/sda 
/dev/sda: 
Timing cached reads: 3816 MB in 2.00 seconds = 1909.06 MB/sec 
[root@cnscn ~]# hdparm -T /dev/sda 
/dev/sda: 
Timing cached reads: 3728 MB in 2.00 seconds = 1866.29 MB/sec 
.检测IDE硬盘的电源管理模式 
[root@cnscn ~]# hdparm -C /dev/sda 
/dev/sda: 
drive state is: standby [省电模式] 
.显示IDE硬盘的内定硬件规格 
[root@cnscn ~]# hdparm -i /dev/sda 
.直接检测硬盘的硬件规格 
[root@cnscn ~]# hdparm -I /dev/sda 
/dev/sda: 
ATA device, with non-removable media 
Model Number: Maxtor 6B160M0 
Serial Number: B404PTJH 
Firmware Revision: BANC1BM0 
Standards: 
Supported: 7 6 5 4 
Likely used: 7 
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: 320173056 
device size with M = 1024*1024: 156334 MBytes 
device size with M = 1000*1000: 163928 MBytes (163 GB) 
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: unknown setting (0x0000) 
Recommended acoustic management value: 192, current value: 254 
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: 
* NOP cmd 
* READ BUFFER cmd 
* WRITE BUFFER cmd 
* Host Protected Area feature set 
* Look-ahead 
* Write cache 
* Power Management feature set 
Security Mode feature set 
* SMART feature set 
* FLUSH CACHE EXT command 
* Mandatory FLUSH CACHE command 
* Device Configuration Overlay feature set 
* 48-bit Address feature set 
* Automatic Acoustic Management feature set 
SET MAX security extension 
Advanced Power Management feature set 
* DOWNLOAD MICROCODE cmd 
* General Purpose Logging feature set 
* SMART self-test 
* SMART error logging 
Security: 
Master password revision code = 65534 
supported 
not enabled 
not locked 
not frozen 
not expired: security count 
not supported: enhanced erase 
Checksum: correct 
.检测并设置IDE硬盘的32位I/O模式 
检测 
[root@cnscn ~]# hdparm -c /dev/sda 
/dev/sda: 
IO_support = 0 (default 16-bit) ［默认16位I／O］ 
设置 
[root@cnscn ~]# hdparm -c 1 /dev/sda 
.检测并设置IDE硬盘的DMA模式 
[root@cnscn ~]# hdparm -d /dev/sda 
/dev/sda: 
... 
[root@cnscn ~]# hdparm -d 1 /dev/sda 
.检测读取文件时，预先存入快取的扇区数 
[root@cnscn ~]# hdparm -a /dev/sda 
/dev/sda: 
readahead = 256 (on) 
.查询并设置硬盘多重扇区存取的扇区数，以增进硬盘的存取效率 
[root@cnscn ~]# hdparm -m /dev/sda 
[root@cnscn ~]# hdparm -m 参数值为整数值如8 /dev/sda 
.将内顾虑缓冲的数据写入硬盘，并清除缓冲区的数据 
[root@cnscn ~]# hdparm -f /dev/sda