#contents *HDD DMA関係 [#nb164aef] ** LinuxでDMAモードオン [#f8f9cd60] *LinuxでDMAモードオン [#f8f9cd60] # IDE HDD DMA MODE /sbin/hdparm -c1 /dev/hda /sbin/hdparm -d1 /dev/hda **LinuxでHDD-DISKモードを調査 [#l08b9b9c] *LinuxでHDD-DISKモードを調査 [#l08b9b9c] [root@mailservice kanri]# /sbin/hdparm -i /dev/hda Model=Maxtor 5T030H3, FwRev=TAH71DP0, SerialNo=T3D1FPRC Config={ Fixed } RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57 BuffType=3(DualPortCache), BuffSize=2048kB, MaxMultSect=16, MultSect=16 DblWordIO=no, OldPIO=2, DMA=yes, OldDMA=0 CurCHS=16383/16/63, CurSects=4228907259, LBA=yes, LBAsects=60030432 tDMA={min:120,rec:120}, DMA modes: mword0 mword1 mword2 IORDY=on/off, tPIO={min:120,w/IORDY:120}, PIO modes: mode3 mode4 UDMA modes: mode0 mode1 mode2 mode3 mode4 *mode5 **LinuxでHDDISK速度を測る [#k4dce3fb] *LinuxでHDDISK速度を測る [#k4dce3fb] happy(UDMA100) [root@happy kanri]# /sbin/hdparm -t /dev/hda Timing buffered disk reads: 64 MB in 1.79 seconds = 35.75 MB/sec(Reiserfs) mailservice(爆撃マシン) [root@mailservice kanri]# /sbin/hdparm -t /dev/hda Timing buffered disk reads: 64 MB in 2.17 seconds = 29.49 MB/sec(Ext3) [root@mailservice /dmcont]# /sbin/hdparm -t /dev/sda Timing buffered disk reads: 64 MB in 1.59 seconds = 40.25 MB/sec(Ext2)