[Solved] Slow SDD disk in linux, FAST in Win10

[bester69]

Hi,
Ive tried two different SDD disk models (Crucial BX500 and SanDisk Plus) in my Acer Extensa5230
and both of them got same results.:

- 120-150MB/s for Windows10
- 30-50 MB/s for debian 9 ;
thought hddparam tests report otherwise:
sudo hdparm -tT /dev/sda
Timing cached reads: 1918 MB in 2.00 seconds = 959.17 MB/sec
Timing buffered disk reads: 674 MB in 3.00 seconds = 224.55 MB/sec


I tried to update firmware and kernel with same results...

My Sytem Now.:
- Debian 9
- 4.4.238-0404238-generic
- SanDisk SSD PLUS 240GB
- BTRFS (fstab)

Code: Select all

UUID=c649c9a7-6ed6-482b-9326-026837988bb7 /              btrfs   subvol=rootsys,defaults,noatime,space_cache,inode_cache 0 1
UUID=c649c9a7-6ed6-482b-9326-026837988bb7 /home          btrfs   subvol=home,defaults,noexec,noatime,space_cache,inode_cache 0 2

TRIM enabled in systemd

sudo systemctl status fstrim.timer
[sudo] password for user:
● fstrim.timer - Discard unused blocks once a week
Loaded: loaded (/etc/systemd/system/fstrim.timer; enabled; vendor preset: enabled)
Active: active (waiting) since Sat 2020-11-21 18:14:43 CET; 14min ago
Trigger: Mon 2020-11-23 00:00:00 CET; 1 day 5h left
Docs: man:fstrim

smartctl -a /dev/sda

smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.4.238-0404238-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, http://www.smartmontools.org

=== START OF INFORMATION SECTION ===
Device Model: SanDisk SSD PLUS 240GB
Serial Number: 20425P448710
LU WWN Device Id: 5 001b44 4a7bf0594
Firmware Version: UF8704RL
User Capacity: 240.057.409.536 bytes [240 GB]
Sector Size: 512 bytes logical/physical
Rotation Rate: Solid State Device
Form Factor: 2.5 inches
Device is: Not in smartctl database [for details use: -P showall]
ATA Version is: ACS-3, ACS-2 T13/2015-D revision 3
SATA Version is: SATA 3.2, 6.0 Gb/s (current: 3.0 Gb/s)
Local Time is: Sat Nov 21 18:29:43 2020 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled

=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

Short self-test routine
recommended polling time: ( 2) minutes.
Extended self-test routine
recommended polling time: ( 41) minutes.

SMART Attributes Data Structure revision number: 1
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
5 Reallocated_Sector_Ct 0x0032 100 100 000 Old_age Always - 0
9 Power_On_Hours 0x0032 100 100 000 Old_age Always - 5
12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 3
165 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 50
166 Unknown_Attribute 0x0032 100 100 --- Old_age Always - 1
167 Unknown_Attribute 0x0032 100 100 --- Old_age Always - 19
168 Unknown_Attribute 0x0032 100 100 --- Old_age Always - 3
169 Unknown_Attribute 0x0032 100 100 --- Old_age Always - 121
170 Unknown_Attribute 0x0032 100 100 --- Old_age Always - 0
171 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
172 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 0
173 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 1
174 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 1
184 End-to-End_Error 0x0032 100 100 --- Old_age Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Command_Timeout 0x0032 100 100 --- Old_age Always - 0
194 Temperature_Celsius 0x0022 055 054 000 Old_age Always - 45 (Min/Max 14/54)
199 UDMA_CRC_Error_Count 0x0032 100 100 --- Old_age Always - 0
230 Unknown_SSD_Attribute 0x0032 100 100 000 Old_age Always - 60130852878
232 Available_Reservd_Space 0x0033 100 100 005 Pre-fail Always - 100
233 Media_Wearout_Indicator 0x0032 100 100 --- Old_age Always - 163
234 Unknown_Attribute 0x0032 100 100 000 Old_age Always - 344
241 Total_LBAs_Written 0x0030 100 100 000 Old_age Offline - 169
242 Total_LBAs_Read 0x0030 100 100 000 Old_age Offline - 44
244 Unknown_Attribute 0x0032 000 100 --- Old_age Always - 0

-------------------

So, I got socked, Am aint gonna be able to enjoy SSD capabilities under linux ???

[Head_on_a_Stick]

Try adding the ssd mount option, btrfs performs very well for me with that applied:

Code: Select all

~$ grep " / " /proc/self/mounts
/dev/nvme0n1p3 / btrfs rw,relatime,ssd,space_cache,subvolid=381,subvol=/alpine 0 0
~$ doas hdparm -t /dev/nvme0n1p3

/dev/nvme0n1p3:
 Timing buffered disk reads: 2964 MB in  3.00 seconds = 987.70 MB/sec
~$

And there are also the various compression algorithms: https://btrfs.wiki.kernel.org/index.php/Compression

Have you tried any other filesystems? Btrfs is the slowest.

[p.H]

Ive tried two different SDD disk models (Crucial BX500 and SanDisk Plus) in my Acer Extensa5230
and both of them got same results.:

- 120-150MB/s for Windows10
- 30-50 MB/s for debian 9 ;

How do you get these results ?

[bester69]

Ive tried two different SDD disk models (Crucial BX500 and SanDisk Plus) in my Acer Extensa5230
and both of them got same results.:

- 120-150MB/s for Windows10
- 30-50 MB/s for debian 9 ;

How do you get these results ?

Just moving/copying a file bigger than 1GByte in same directory... and using timer.,
in Win10, that file took around just 10 seconds while in linux around 30 seconds.. its clearly 3 times slower in linux.. :shock:

Thanks a lot for help, I really appreciate it..

[bester69]

dd if=/dev/zero of=sal bs=100M count=10
10+0 registros leídos
10+0 registros escritos
1048576000 bytes (1,0 GB, 1000 MiB) copied, 3,76175 s, 279 MB/s

------------------
X FILE CLOSED (The culpier was dolphin explorer[/b)

Ok, everything was OK, these SSD ones are very weird to understand and they seems to behave different according to the tools that use them..

[b]The culpier was dolphin explorer... Ive used Nautilus.. and It takes same time than Windows to move/copy files...I wonder what dolphin is doing under gui to take so long in transfer files..

Now, im happy, thanks to all for help..

[p.H]

Just moving/copying a file bigger than 1GByte in same directory

Speed in file operation also depends on the filesystem and its settings, not only the drive and operating system.

[bester69]

Here, you can see differences times among files explores
https://bbs.archlinux.org/viewtopic.php?id=192828

dolphin: 1:23
thunar: 1:17
nautilus: 0:26
windows exlorer: 0:14
pcmanfm: 0:10
command line: 0:02

Im searching for a workaround for dolphin...we will see if something available