我试图从/ backup /文件夹复制一个文件到/ backup / abc /并且花费了很多时间。 在其他服务器上执行的复制操作非常快。
# df -HP Filesystem Size Used Avail Use% Mounted on /dev/sdc3 482G 351G 107G 77% / tmpfs 4.2G 74k 4.2G 1% /dev/shm /dev/sdc1 204M 36M 157M 19% /boot /dev/sdb3 2.0T 590G 1.3T 32% /data /dev/sda4 2.0T 705G 1.2T 38% /backup 与其他服务器相比，磁盘的写入速度非常慢。 这背后的原因是什么？
# hdparm -t /dev/sdc3 /dev/sdc3: Timing buffered disk reads: 2 MB in 3.00 seconds = 682.67 kB/sec # hdparm -t /dev/sdc1 /dev/sdc1: Timing buffered disk reads: 2 MB in 4.10 seconds = 499.51 kB/sec # hdparm -t /dev/sdb3 /dev/sdb3: Timing buffered disk reads: read(2097152) returned 4096 bytes # hdparm -t /dev/sda4 /dev/sda4: Timing buffered disk reads: 4 MB in 6.10 seconds = 671.48 kB/sec
更新 ：更多信息
# fdisk -l Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x3b011cfb Device Boot Start End Blocks Id System /dev/sda4 1 243201 1953512001 83 Linux Partition 4 does not start on physical sector boundary. Disk /dev/sdc: 500.1 GB, 500107862016 bytes 255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0000272a Device Boot Start End Blocks Id System /dev/sdc1 * 1 26 204800 83 Linux Partition 1 does not end on cylinder boundary. /dev/sdc2 26 1301 10240000 82 Linux swap / Solaris /dev/sdc3 1301 60802 477940736 83 Linux