J
Jan Stożek
Hi,
I measured transfer speed on my disk, which I use for some time
already, the result is here: http://bit.ly/1uojTNe.
Interestingly, the size of the ragged part, which is about 60%
of the disk's capacity, is (almost) exactly the size of my system
disk, while the other part of the disk, with almost uniform
performance, remains unused for some time already - though it HAD been
used previously. What is even more interesting, when sime time ago I
measured the disk performance after the system installed on the
*second* partition of the very same disk had been used for some time,
the graph looked almost exactly mirrored: it started with a degraded
performance on the initial sectors (like it is now), then there was a
large area of a pretty uniform, high performance representing the then
unused partition, followed by a ragged area of the partition in use.
Unfortunately, I do not have a screenshot to demonstrate it.
The system in question happens to be OpenSuse Linux, so most -
if not all - folders with significant amount of writes (/home, /var,
/srv, /swap) are located on magnetic drives or ramdisks. Noatime is
turned on, so I believe that the actual writes to the SSD are made
only during updates and upgrades. The disk is trimmed once a week
automatically.
The questions:
* Is this performance characteristic a significant symptom of a
wear?
* Is it dangerous to the data
* Can it be reversed anyhow?
The disk is Kingston SSDNOW 30GB. Performance was measured
using HD Tune run from Hiren's Diag CD, so it had nothing to do with
the drives. The computer in question is my home PC - used on a daily
basis, turned-off for the nights.
Thank you very much in advance for any hints.
--
Best regards,
(js).
PS. In case you prefer to responding directly, please remove the dash
with all subsequent letters from the email address.
I measured transfer speed on my disk, which I use for some time
already, the result is here: http://bit.ly/1uojTNe.
Interestingly, the size of the ragged part, which is about 60%
of the disk's capacity, is (almost) exactly the size of my system
disk, while the other part of the disk, with almost uniform
performance, remains unused for some time already - though it HAD been
used previously. What is even more interesting, when sime time ago I
measured the disk performance after the system installed on the
*second* partition of the very same disk had been used for some time,
the graph looked almost exactly mirrored: it started with a degraded
performance on the initial sectors (like it is now), then there was a
large area of a pretty uniform, high performance representing the then
unused partition, followed by a ragged area of the partition in use.
Unfortunately, I do not have a screenshot to demonstrate it.
The system in question happens to be OpenSuse Linux, so most -
if not all - folders with significant amount of writes (/home, /var,
/srv, /swap) are located on magnetic drives or ramdisks. Noatime is
turned on, so I believe that the actual writes to the SSD are made
only during updates and upgrades. The disk is trimmed once a week
automatically.
The questions:
* Is this performance characteristic a significant symptom of a
wear?
* Is it dangerous to the data
* Can it be reversed anyhow?
The disk is Kingston SSDNOW 30GB. Performance was measured
using HD Tune run from Hiren's Diag CD, so it had nothing to do with
the drives. The computer in question is my home PC - used on a daily
basis, turned-off for the nights.
Thank you very much in advance for any hints.
--
Best regards,
(js).
PS. In case you prefer to responding directly, please remove the dash
with all subsequent letters from the email address.