Hi,
I have an old 128GB SSD that i use as an external drive in a eSATA case.
When I copy a lot of data on it, after some time, the transfer rate drops below 1 MBps, just like if the cache would be full.
If i launch a test using the disk program in Gnome3, the transfert rate is 200 MBps read / 120MBps write, even with a hundred 1000MB samples.
What is happening ?
Scheduled Maintenance: We are aware of an issue with Google, AOL, and Yahoo services as email providers which are blocking new registrations. We are trying to fix the issue and we have several internal and external support tickets in process to resolve the issue. Please see: viewtopic.php?t=158230
SSD transfert rate issue in use, but not in test
-
- Posts: 1406
- Joined: 2009-09-10 20:15
- Location: Saint-Petersburg, Russian Federation
- Been thanked: 11 times
Re: SSD transfert rate issue in use, but not in test
Try copy one big file by size 1GB or more and compare result.
Peter.
Peter.
Re: SSD transfert rate issue in use, but not in test
Code: Select all
time cp big1700MBfile mySSD
real 0m15,065s
user 0m0,008s
sys 0m1,092s
I think the problem happen when transfering a lot of small files.
The SSD is software encrypted, don't know if this is important.
Re: SSD transfert rate issue in use, but not in test
The SSD is encrypted using LUKS.
All my laptops are encrypted, I haven't noticed any performance issues (although the CPU is much less powerful on laptops than on the desktop i am using with the external drive)
All my laptops are encrypted, I haven't noticed any performance issues (although the CPU is much less powerful on laptops than on the desktop i am using with the external drive)