Package: testdisk
Version: 7.0-3+b3
Severity: normal
Tags: upstream
I started testdisk on a 465 GiB volume, then had to interrupt it when
it was only 130 GiB through -- it was predicting at least another
hour.
I restarted the session later, and after the restart, it (incorrectly)
predicts only a few minutes.
I don't see a bug reporting venue upstream other than a webforum
(which i'd rather not register for and can't track easily) so i'm
reporting this in the debian BTS and trying to forward it upstream as
well.
Here's why i suspect this is happening:
Using these variables of time and position:
T_start = Time of start of current run
T_now = Current time
P_max = Size of the volume
P_cur = Current position of the scan in the volume
P_start = Initial position of the current run
The estimated time should probably be calculated by:
(T_start - T_now)
----------------- × (P_max - P_cur)
(P_cur - P_start)
But instead it looks like it is calculated by:
(T_start - T_now)
----------------- × (P_max - P_cur)
P_cur
These are identical when the current run starts at the beginning of
the volume (i.e. P_start == 0), but it is clearly wrong when P_start
is greater than zero.
--dkg
-- System Information:
Debian Release: buster/sid
APT prefers testing-debug
APT policy: (500, 'testing-debug'), (500, 'testing'), (500, 'oldstable'),
(200, 'unstable-debug'), (200, 'unstable'), (1, 'experimental-debug'), (1,
'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 4.17.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8),
LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
Versions of packages testdisk depends on:
ii libc6 2.27-5
ii libcom-err2 1.44.3-1
ii libext2fs2 1.44.3-1
ii libjpeg62-turbo 1:1.5.2-2+b1
ii libncursesw6 6.1+20180714-1
ii libntfs-3g88 1:2017.3.23-2
ii libtinfo6 6.1+20180714-1
ii libuuid1 2.32.1-0.1
ii ntfs-3g 1:2017.3.23-2
ii zlib1g 1:1.2.11.dfsg-1
testdisk recommends no packages.
testdisk suggests no packages.
-- no debconf information
