87%
25.09.2023
Rubén Llorente ... had a serviceable Internet connection at home; yet, I was stuck with a pitiful one. My ISP provided 3Mbps of symmetric bandwidth in an age in which urban dwellers had access to subscriptions 10 times
36%
02.08.2021
_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 077 063 --- Pre-fail Always - 56770409
3 Spin_Up_Time 0x0003
36%
16.03.2021
, (T) 4096B-4096B, ioengine=libaio, iodepth=32
fio-3.12
Starting 1 process
Jobs: 1 (f=1)
test: (groupid=0, jobs=1): err= 0: pid=5956: Sat Jan 9 16:38:53 2021
read: IOPS=256k, BW=998MiB/s (1047MB
34%
11.04.2016
(512 MB) copied, 49.1424 s, 10.4 MB/s
If you want to empty the read and write cache for benchmark purposes, you can do so using:
sync; echo 3 > /proc/sys/vm/drop_caches
Sequential access
34%
25.03.2021
, ioengine=libaio, iodepth=32
fio-3.12
Starting 1 process
Jobs: 1 (f=1)
test: (groupid=0, jobs=1): err= 0: pid=5956: Sat Jan 9 16:38:53 2021
read: IOPS=256k, BW=998MiB/s (1047MB/s)(2045MiB/2049msec
33%
18.07.2013
buffered disk reads: 616 MB in
3.00 seconds = 205.03 MB/sec
$ hdparm -T /dev/sda
/dev/sda:
Timing cached reads: 6292 MB in
2.00 seconds = 3153.09 MB/sec
If this were a spinning disk, you would also
32%
07.11.2023
5.3M 8.2k 5.3M 1% /run/lock
/dev/nvme1n1p1 1.1T 488G 468G 52% /home
/dev/nvme0n1p1 536M 6.4M 530M 2% /boot/efi
/dev/sda1 6.0T 3.4T 2.4T 60% /home2
tmpfs
32%
13.12.2018
(USB 2), and a Samsung Fit Plus 32 (USB 3).
Disk Caches
The OS is not the only player in the caching business. Examining a Samsung 750 SATA SSD drive, you cannot but notice a 256MB RAM buffer [8
31%
15.02.2012
2
0
0
0
0
0
2
256KB < < 512KB
2
2
2
3
2
2
2
3
512KB < < 1MB
3
2
2
31%
26.01.2012
2
0
0
0
0
0
2
256KB < < 512KB
2
2
2
3
2
2
2
3
512KB < < 1MB
3
2
2
