19 Aug
2007
19 Aug
'07
2:16 p.m.
--- Matthias =?iso-8859-1?q?Sch=F6nborn?= <mbs1303(a)gmx.de wrote:
Hi list,
A message like this really does mean that your hard disk can't keep
up with the demand for data. The cause of this however can come from several
sources. Since you are running several programs at once, most likely synced
together through the Jack transport, this means that they are probably all
trying to access data from the drive(s) at the same time, and as you know,
audio can be rather dense when uncompressed. So the solution? It is often
recommended to have a separate disk for recording audio and whatnot to, that
way, when linux needs to read info for running a program it wont interfere
with the audio data access on another disk. Of course faster sata/serial disk
drives will help as well.
Lately I've got some issues with ardour repeatedly giving an error
message
saying that ardour wasn't able to continue
playback because the
disk was too
slow and ardour couldn't fetch the data. How can
this be
fixed?
I'm using Kubuntu Feisty with a low latency kernel, and in my
setup I run
Jack, QSynth, Hydrogen, Rosegarden, and Ardour - is
the load
just too heavy
(I can hardly imagine)? Ah, and I'm using an
external M-Audio
Interface if
that's of any importance.
Regards,
Matthias
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19 Aug
19 Aug
6:14 p.m.
New subject: Ardour Error: Hard disk too slow
A message like this really does mean that your hard
disk can't keep
up with the demand for data. The cause of this however can come from
several sources. Since you are running several programs at once, most
likely synced together through the Jack transport, this means that they are
probably all trying to access data from the drive(s) at the same time, and
as you know, audio can be rather dense when uncompressed. So the solution?
It is often recommended to have a separate disk for recording audio and
whatnot to, that way, when linux needs to read info for running a program
it wont interfere with the audio data access on another disk. Of course
faster sata/serial disk drives will help as well.
Hm... that sounds a little bit disappointing, especially as I found out that
theres an SATA- disk in my laptop (Samsung X20). sudo hdparm -tT /dev/sda
results in:
Timing cached reads: 1592 MB in 2.00 seconds = 795.96 MB/sec
Timing buffered disk reads: 96 MB in 3.06 seconds = 31.40 MB/sec
Shouldn't that be fast enough?
Are there any people here who are recording to systemdisks with no problems?
As a workaround, I'm recording the Hydrogen track in Ardour, so that I can
switch Hydrogen of. I'm not very happy with it, though.
8:18 p.m.
New subject: Ardour Error: Hard disk too slow
On Sun, 2007-08-19 at 22:14 +0200, Matthias Schönborn wrote:
let me put it like this. the behaviour of disks & filesystems never
ceases to amaze me in its unpredictability. i recently built up a
machine for someone that had two identical samsung disk drives in it.
they were both formatted in the same way to hold ext3 filesystems. One
had the OS installed on it, the other was empty. the systemdisk was
incapable of recording even 6 tracks at once without this error; the
other disk could do 64 without breaking much of sweat. the difference? i
don't know, but if i had to point a finger i'd point it at the OS
install fragmenting the disk allocation in ways that made it impossible
for the filesystem to allocate new, large, contiguous blocks in an
efficient way. this is just a guess. i really don't know the reason.
the error message from ardour means *precisely* what it says: ardour was
trying to read/write data from/to the disk, and it was not happening
quickly enough. this could be the fault of the disk h/w, the filesystem,
the disk controller, or the kernel. or all of them.
--p
A message like
this really does mean that your hard disk can't keep
up with the demand for data. The cause of this however can come from
several sources. Since you are running several programs at once, most
likely synced together through the Jack transport, this means that they are
probably all trying to access data from the drive(s) at the same time, and
as you know, audio can be rather dense when uncompressed. So the solution?
It is often recommended to have a separate disk for recording audio and
whatnot to, that way, when linux needs to read info for running a program
it wont interfere with the audio data access on another disk. Of course
faster sata/serial disk drives will help as well.
Hm... that sounds a little bit disappointing, especially as I found out that
theres an SATA- disk in my laptop (Samsung X20). sudo hdparm -tT /dev/sda
results in:
Timing cached reads: 1592 MB in 2.00 seconds = 795.96 MB/sec
Timing buffered disk reads: 96 MB in 3.06 seconds = 31.40 MB/sec
Shouldn't that be fast enough?
Are there any people here who are recording to systemdisks with no problems? 
8:49 p.m.
New subject: Ardour Error: Hard disk too slow
On Sun, Aug 19, 2007 at 06:18:03PM -0400, Paul Davis wrote:
On Sun, 2007-08-19 at 22:14 +0200, Matthias Schönborn
wrote:
> Are there any people here who are recording to systemdisks with no problems?
My laptop has only one disk, but I'm using a dedicated audio file partition.
Never had any problems of this sort.
... the systemdisk was
incapable of recording even 6 tracks at once without this error; the
other disk could do 64 without breaking much of sweat. the difference? i
don't know, but if i had to point a finger i'd point it at the OS
install fragmenting the disk allocation in ways that made it impossible
for the filesystem to allocate new, large, contiguous blocks in an
efficient way. this is just a guess. i really don't know the reason.
Did you have a separate partition for the audio files ?
--
FA
Follie! Follie! Delirio vano è questo !
20 Aug
20 Aug
5:52 a.m.
New subject: Ardour Error: Hard disk too slow
On Monday 20 August 2007 00:57:24 Fons Adriaensen wrote:
On Sun, Aug 19, 2007 at 06:18:03PM -0400, Paul Davis
wrote:
That sounds promising! Is it possible to split my /home partition into two new
ones? I have approx 15GB free and would create a new /audio partition with
this space.
On Sun, 2007-08-19 at 22:14 +0200, Matthias
Schönborn wrote:
> Are there any people here who are recording to systemdisks with no
> problems?
My laptop has only one disk, but I'm using a dedicated audio file
partition. Never had any problems of this sort. 
21 Aug
21 Aug
9:51 a.m.
New subject: Ardour Error: Hard disk too slow
Matthias Schönborn wrote:
hi matthias, look i am using ibm-thinkpad-r50e and i am able to record
16 tracks at once to the same disc as my system is on. i do not use an
extra audio partition on it, just recording into my home directory - no
problems at all.
murija2:/home/nowhiskey# hdparm -tT /dev/hda
/dev/hda:
Timing cached reads: 672 MB in 2.00 seconds = 335.79 MB/sec
Timing buffered disk reads: 100 MB in 3.02 seconds = 33.07 MB/sec
murija2:/home/nowhiskey#
perhaps it is because i am using a multiface, don't know.
cheers,
doc
A message like
this really does mean that your hard disk can't keep
up with the demand for data. The cause of this however can come from
several sources. Since you are running several programs at once, most
likely synced together through the Jack transport, this means that they are
probably all trying to access data from the drive(s) at the same time, and
as you know, audio can be rather dense when uncompressed. So the solution?
It is often recommended to have a separate disk for recording audio and
whatnot to, that way, when linux needs to read info for running a program
it wont interfere with the audio data access on another disk. Of course
faster sata/serial disk drives will help as well.
Hm... that sounds a little bit disappointing, especially as I found out that
theres an SATA- disk in my laptop (Samsung X20). sudo hdparm -tT /dev/sda
results in:
Timing cached reads: 1592 MB in 2.00 seconds = 795.96 MB/sec
Timing buffered disk reads: 96 MB in 3.06 seconds = 31.40 MB/sec
Shouldn't that be fast enough?
Are there any people here who are recording to systemdisks with no problems?
As a workaround, I'm recording the Hydrogen track in Ardour, so that I can
switch Hydrogen of. I'm not very happy with it, though.
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6 comments
6 participants
participants (6)
-
Andrew Lewis -
arisstotle.54695488＠bloglines.com -
Dragan Noveski -
Fons Adriaensen -
Matthias Schönborn -
Paul Davis