-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On Wednesday, 2018-02-28 at 10:54 +0100, Liam Proven wrote:
On Tue, 27 Feb 2018 17:31:25 -0500 Anton Aylward <> wrote:
Yes, that and eliminating the journal reduces the number of times the disk gets 'hit'.
Exactly. That's the point of the exercise.
But from an integrity POV removing the journal on a production device worries me. The reference you give for the USB stick, well, yes, OK.
I am not 100% certain of this, but in my fairly limited experience of Flash device failure, the failure mode is significantly different from that of spinning HDs.
HDs degrade slowly and blocks can become unreadable or writable. A journal can help you to survive this.
Flash devices tend to fail suddenly and completely and journalling is no help -- everything is gone.
So I have an unsubstantiated suspicion that in real life a journalling FS won't help you with a failing SSD, but the existence of the journal may bring about that failure quicker.
A journal helps in the case of normal filesystem crash, like a power failure. Recovery is certainly faster, and perhaps (this is where I have doubts) more complete. In the case of an SSD random access is very fast, so it would compensate the lack of journal. Would still some actions be missing? I don't know. In the case of USB stick it is worth it (they don't resist that many writings), but in the case of SSD I have gone for "normal" settings. I don't know what the life of the device will be, I expect several years. In any case, at least on the desktop machine, a cron job does a backup to rust, just in case. - -- Cheers, Carlos E. R. (from openSUSE 42.3 x86_64 "Malachite" at Telcontar) -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iEYEARECAAYFAlqWjDQACgkQtTMYHG2NR9Xr2wCcD8pDsydNC5c5ThZAjeGJbIH1 8OIAn0ZTMrr0ghV8UtcIu8nLc9iIpS+r =e1+d -----END PGP SIGNATURE----- -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org