ost of the MMIO region above 3GB
preventing RAM from being mapped there, and doesn't support remapping
the covered RAM to above 4GB. Nothing the kernel can do about it.
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ally cause such a problem.
So now we wonder if this might be an MCE bug, or really a HW problem,
and if it is one of the CPUs, or the RAM thats faulty.
We are running 2.6.18.
Sounds like some bad RAM..
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cond_resched() voluntarily since CONFIG_PREEMPT_VOLUNTARY and
CONFIG_PREEMPT_BKL are both turned on? From my understanding these 2
options should make schedule happen even if CPU is under heavy
load..
No, only CONFIG_PREEMPT will do that.
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uldn't
have to, and yet the drive loses power so it does an emergency retract.
Making the kernel shutdown on reboot would only add more spindown/up
cycles for normally working systems.
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ossible to disable the pagecache?
Not as far as I know, it's unlikely this would be of any benefit.
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More maj
be personally CC'ed in the answers/comments posted in
response to this post ?
Your compiler is probably too new to be able to compile 2.6.9. You'd
likely be better off trying the latest kernels and making a detailed
report of the problems you're having with it..
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certain
source (defective RAM? Bad application or device
driver?), please let me know as I'm pulling what
little hair I have left out on this one. Suggestions
on what to try would be greatly appreciated. Thanks!
First try updating to the latest RHEL update kernel, that one's out of
d are in likely share a physical interrupt line
and there is no way to separate them in software. You can try moving the
card(s) to different slots..
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"make modules_install install".
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Jeff Garzik wrote:
Robert Hancock wrote:
This adds some NCQ blacklist entries taken from the Silicon Image
3124/3132
Windows driver .inf files. There are some confirming reports of problems
with these drives under Linux (for example
http://lkml.org/lkml/2007/3/4/178)
so let's disable N
g timeslots on the bus - even a
USB keyboard/mouse on the same hub would prevent it from getting enough
bandwidth.
Essentially the driver should fallback to a lower-bandwidth descriptor
if the one it tries to use fails rather than just bailing out.
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ide, if ACPI is disabled you can't take advantage
of CPU clock frequency scaling to save power.
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This adds some NCQ blacklist entries taken from the Silicon Image 3124/3132
Windows driver .inf files. There are some confirming reports of problems
with these drives under Linux (for example http://lkml.org/lkml/2007/3/4/178)
so let's disable NCQ on these drives.
Signed-off-by: Robert Ha
ke an old RHEL3 kernel - first off try the latest updated kernel
which is 2.4.21-47.0.1.EL.
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esn't fill the write cache it's not as
much of an issue, but if the write cache fills up then the disk may have
to flush out data in a suboptimal order since it can't see what other
requests are coming and can't change the order in which that data shows up.
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kernel's header files and strips out everything inside #ifdef __KERNEL__.
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27;
defaults, therefore, I was curious why is NCQ enabled by default?
Normally NCQ is faster, though it depends on the drive firmware. It's
also possible that software RAID is a case where there are negative
interactions.
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ightly possible that some regression in
the sata_nv module could trigger an MCE? If not, would you put your money on
the RAM, or could the motherboard be blamed? I hope it's not the CPU ;)
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handle this by assigning the devices who had no
space assigned by the BIOS last, so that we wouldn't try to assign those
until we'd already assigned everything else..
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it at speeds about 5.5Gbps, that is my
question.
Why is it necessary to avoid bursting? There should be enough buffering
along the chain to avoid packet loss with reasonable burst sizes.
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cable on that drive? The controller is reporting
SError values and CMD errors, which likely tends to indicate some kind
of SATA communication problem..
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nd and the controller is still waiting for a
response.
Could be that this is another drive that needs to be added to the NCQ
blacklist, some similar Maxtor models seem to have issues..
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's what it's running at.
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z bus
rate is should be capable of.
How are you determining this?
> Any ideas on how to make it work at full speed?
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inux/kernel/git/torvalds/linux-2.6.git;a=commit;h=5e5c74a5e11d1e2a99d03132cc6c4455016db6c2
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More majordomo info at ht
ve
has to be added to the NCQ blacklist.
Max
This does indeed look like a drive side issue to me (the controller is
reporting CPBs with response flags 2 which as far as I can tell
indicates it's still waiting for the drive to complete the request).
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sing NULL is
better than directly using 0 in C. In kernel, I know it used its own
NULL, which may be defined as ((void*)0), but it's _still_ different
from raw zero. So can I say using NULL is better than 0 in kernel?
It's the preferred style, Sparse will complain about using 0 for a null
libata and ide sources and documentation
but still dont have broad picture.
I believe you should be able to do this by sending ATA pass-through SCSI
commands into the device using SG_IO, without any kernel changes. It's
really the mechanism that's meant for this..
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upport for that chipset was late in coming but I
think it does have it now too..
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en be
able to usefully test?
Yes, you should be able to.
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th
Jeff Garzik wrote:
[EMAIL PROTECTED] wrote:
From: Robert Hancock <[EMAIL PROTECTED]>
Reading from the ATA shadow registers while we are in ADMA mode may cause
undefined behavior. Don't read the ATA status register when completing
commands for this reason, it shouldn't
just before you do the sleep, you'll sit there
waiting for something that already occurred.
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mlock this buffer from the userspace
application, rather than trying to achieve this in the driver..
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ned-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.21-rc3-git3/drivers/ata/sata_nv.c 2007-03-08 17:15:25.0
-0600
+++ linux-2.6.21-rc3-git3edit/drivers/ata/sata_nv.c 2007-03-08
17:19:42.0 -0600
@@ -874,8 +874,14 @@
if (status &
result taskfile requested
to execute in ADMA mode, since that requires accessing the shadow registers.
We also still need to override tf_read since libata will read the result
taskfile on a command failure, and we need to go into port register mode
before allowing this.
Signed-off-by: Robert
mmu_page);
addr += PAGE_SIZE;
iommu_page++;
}
Andi, have you had a look at this? I'm a bit surprised at the lack of
reaction to this find..
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efore
applying your patch?
I've done so now, assuming this _will_ work. The reason I ask is that your
diff was offset by 12 lines versus -rc2.
I assume it's OK, though I'm not a git expert. I diffed against rc2-git3
which has some CONFIG_PM ifdef changes, those shouldn't
Alistair John Strachan wrote:
Can you try reverting commit 721449bf0d51213fe3abf0ac3e3561ef9ea7827a
(link below) and see what effect that has?
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h
=721449bf0d51213fe3abf0ac3e3561ef9ea7827a
Obviously, I'll let you know if i
settings like CONFIG_SMP in order to actually
be atomic, and that's not guaranteed in userspace.
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Alistair John Strachan wrote:
On Thursday 01 March 2007 15:13, Alistair John Strachan wrote:
On Thursday 01 March 2007 14:45, Robert Hancock wrote:
This one seems a bit different. This time it's not related to NCQ vs.
non-NCQ (this is a non-NCQ write here), it's in ADMA mod
efore), and
from the CPB data it appears the command completed but the controller's
registers aren't indicating that it has. Not sure if I've seen one like
that before..
How easily can you reproduce this?
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e patches to
allow NCQ support on MCP51 and MCP61 chipsets back in October, but I
haven't seen any, or information required to implement same..
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commands and non-NCQ
commands. Hopefully this is fixed in 2.6.21-rc. This doesn't seem to be
the issue here, since his system isn't using ADMA mode, for reasons
unclear to me..
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Hom
arm,
There is one thing that seems odd, if you do have an nForce4 chipset,
the kernel should be running the SATA controller in ADMA mode in 2.6.20,
but it doesn't seem like it is from your dmesg output. Can you post the
output of "lspci -vvn"? Also what kind of motherboa
)
sda: Write Protect is off
sda: Mode Sense: 00 3a 00 00
SCSI device sda: write cache: enabled, read cache: enabled, doesn't
support DPO
or FUA
Some command timed out, apparently. From this one can't easily say why.
Please send full dmesg.
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_mysql
MySQL tries to get a mutex but it spends about 16.8% of CPU on 8 core
machine.
Curious that it calls pthread_mutex_trylock (as opposed to
pthread_mutex_lock) so often. Maybe they're doing some kind of mutex
lock busy-looping?
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[EMAIL PROTECTED] wrote:
On Feb 26, 2:26 pm, Robert Hancock <[EMAIL PROTECTED]> wrote:
[EMAIL PROTECTED] wrote:
My C++ program needs an intrusive list, possibly with RCU
capabilities.The data structurelist_head, defined in /usr/include/
linux/list.h , fits perfectly these needs.
You
they depend on are not guaranteed to work.
Also keep in mind that using these structures probably makes your
program a derivative of the kernel and would require your software to be
released under the GPL.
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2.6.19, too.
You need to run the irqbalance daemon to do this, unless the interrupts
are distributed in hardware (which only some machines do).
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s being able to drive a piece of hardware, does anything define which
driver will get first dibs on attaching to the device when it's
hotplugged? I don't know how this ordering will be enforced in that case.
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.
If you wait long enough after halting before you power down, you may not
get the noise, since many laptop drives unload the heads after a fairly
short period of inactivity, and so the heads are already unloaded when
the power is shut off.
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: spurious interrupt (irq_stat 0x8 active_tag -84148995 sactive 0xf)
Sounds like those are some that we should be blacklisting as well,
unless Eric has a good reason why not (CCing). Can you provide the full
firmware revision strings from those drives, i.e. from "hdparm -I"?
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er instead, since any PATA driver could take
advantage of this feature.
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would be more likely to
fit inside the queue..
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n adding a feature
(IMHO).
It's a feature that's in drivers/ide (I believe) but isn't in libata or
the SCSI layer.
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Robert Hancock wrote:
Alan wrote:
Stick some printk calls in drivers/ata/libata-eh.c in ata_eh_suspend, or
turn on all the ATA debug and shutdown, the code should issue a cache
flush followed by a standbynow1 command for each disk.
Alan
I believe it runs on suspend, but we don't run
This patch adds in some NCQ blacklist entries taken from the Silicon
Image Windows drivers' .inf files for the 3124 and 3132 controllers.
These entries were marked as ""DisableSataQueueing". Assume these are
in their blacklist for a reason and disable NCQ on these drives.
S
isn't
outstanding, since the drive may be issuing spurious completions.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.21-rc1edit/drivers/ata/sata_nv.c.prev 2007-02-21
22:17:31.0 -0600
+++ linux-2.6.21-rc1edit/drivers/ata/sata_nv.c 2007-02-21 22:22:14.0
figured for UDMA/33
I can assure you that is an 80-wire cable on that device :-) I suppose
next step is adding debug to see where it is having issues?
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tdown, do we?
Tejun Heo had a patch for sd that could (optionally) trigger a START
STOP UNIT command to spin the disk down after synchronizing the cache
before shutdown, but I haven't heard anything of it lately..
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Matthew Fredrickson wrote:
On Feb 20, 2007, at 9:43 PM, Robert Hancock wrote:
Matthew Fredrickson wrote:
I have noticed something that might be related as well. I am working
on a device driver that would have periodic data errors due to
exceptionally long interrupt handling latency. I
n't support non-NCQ FUA, and
those (especially the latter) seem to be very popular models.
Likely Seagate didn't implement that command since they figured nobody
would use that if they had NCQ..
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.
The only thing we need to override as far as ADMA and BMDMA is the
post_internal_cmd callback, where we should only call ata_post_internal_cmd
if we are in port-register mode.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git14edit/drivers/ata/sata_nv.c.before_cleanup 2007
at problem at least on nForce4 chipsets..
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this state?
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coincidental, it is the only sane way to design hardware. You
just can't go firing off interrupts without a driver having
intentionally enabled them. There are a few devices that have had such
issues, but they have been few and far between, certainly not enough to
warrant the complexity o
to
handle it and shut off the interrupt before it allows any interrupts
to be enabled. (We have such a quirk for certain network controllers where
the boot ROM can leave the chip generating interrupts on bootup.)
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311x (since that one is known to have
problems) as well as for ITE821x when in smart mode.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
---
Any comments on this version? It's essentially what I posted previously
in "libata FUA revisited", except that the default for F
, accessing them will likely result in a cache miss.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-15 22:36:02.0
-0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c.delayandfixes 2007-02-19
17:00:14.0 -0600
@@ -
This edits the taskfile setup to more closely match the way that libata
sends the taskfile for other controllers. This avoids putting taskfile writes
into the CPB buffer that are not needed according to the taskfile flags.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-
When error handling occurs with pending commands, output the contents
of the next CPB count and next CPB index registers as well as the others,
since these may be useful for debugging.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007
We already have code that handles hotplug interrupt indications in ADMA
mode, this turns on the control flag that actually enables these interrupts.
Also fixes some cases in the same functions where a 16-bit register was read
using a readl instead of a readw.
Signed-off-by: Robert Hancock
This patch series contains several fixes for issues I noticed while
debugging some command timeout problems. None of these proved to be
related to that issue, but they fall into the category of things
we should be doing anyway.
Split into separate patches to ease bisecting in case of issues.
-
Clean up the initialization of the CPB and APRD structures so that we
strictly follow the rules for ordering of writes to the CPB flags and
response flags, and prevent duplicate initialization.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6edit/drivers/ata/sat
ned up somewhat. Also, it's been inadvertently tested (it seems that
pata_amd Nvidia cable detection is broken in current -git..)
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6/drivers/ata/libata-core.c 2007-02-11 17:31:19.0
-0600
+++ linux-2.6.20-g
: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6edit/drivers/ata/sata_nv.c.before_hacking 2007-02-15
18:19:13.0 -0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-15 22:36:02.0
-0600
@@ -219,6 +219,7 @@
void __iomem * gen_block;
if (!np->in_shutdown)
mod_timer(&np->oom_kick, jiffies + OOM_REFILL);
Did anyone push this patch into mainline? forcedeth on 2.6.20-git14 is
still completely broken without this patch.
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need
to drain the drive queue before issuing the WRITE/FUA. And at that point
we may as well not use the NCQ command, just go for the regular non-NCQ
FUA write. I think that should be safe.
Aside from the issue above, as I mentioned elsewhere, lots of NCQ drives
don't support non-NCQ FUA
ex to start with. It looks like pata_amd does an
ata_pci_clear_simplex only for certain chip models, maybe this model
needs it as well?
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l hang and never return. It seems to be stuck in the idle
loop().
On FAT filesystems this forces the entire file contents of that size to
be written out with zeros. Are you sure the kernel just isn't busy
writing out all that data to the disk?
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module-y := file1.o file2.o file3.o
else
# Normal Makefile
KERNELDIR := /lib/modules/`uname -r`/build
all::
$(MAKE) -C $(KERNELDIR) M=`pwd` $@
endif
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Jeff Garzik wrote:
Robert Hancock wrote:
It's curious that only the post-cache-flush command is having issues,
and normal NCQ operation seems fine. Maybe it's related to that tag 0
being reused repeatedly?
If you take cache flush out of the equation, what happens when NCQ is
enab
that
calls the kernel build system, and it works fine.
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the bo
there's something wrong with
the way we are giving the commands to the controller, using the
APPEND register. That's another thing that's not in the ADMA standard.
It's curious that only the post-cache-flush command is having issues,
and normal NCQ operation seems fine. Maybe
Q on it entirely as
obviously little thought or testing went into the implementation..
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from under the SCSI menu into a new ATA menu (in
2.6.19 I think).
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d be nice if you add a comment why the drives are added
for documentation.
Will do shortly. Eric, do you have any info on the blacklisting of that
Maxtor 7B250S0 drive? I would hope that Silicon Image would have a good
reason for blacklisting that one..
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Robert Hancock wrote:
Given the above, what I'm proposing to do is:
-Remove the blacklisting of Maxtor BANC1G10 firmware for FUA. If we need
to FUA-blacklist any drives this should likely be added to the existing
"horkage" mechanism we now have. However, at this point I don&
BANC1B70
HTS541060G9SA00 MB3OC60D
HTS541080G9SA00 MB4OC60D
HTS541010G9SA00 MBZOC60D
(the latter 3 being Hitachi Travelstar drives)
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Robert Hancock Saskatoon, SK, Canada
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d say the driver should just define a suspend function that
returns -ENOSYS and then the user would know they have to remove that
module, etc. before suspending (there is at least some distro script
support for doing that automatically based on a config file), since it
hasn't a hope of worki
it won't spew at inappropriate times like suspend/resume.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- linux-2.6.20-git6/drivers/ata/sata_nv.c 2007-02-11 17:31:19.0
-0600
+++ linux-2.6.20-git6edit/drivers/ata/sata_nv.c 2007-02-11 17:40:48.0
-0600
@@ -1442
y. If
the event was something else, then pcim_enable_device complains because
the device was previously enabled and never disabled.
Not sure what the best way to fix this is?
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Robert Hancock Saskatoon, SK, Canada
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ADMA-capable controllers provide a bit in the status register that appears
to indicate that the controller detected an SError condition. Update sata_nv
to detect this and trigger error handling in order to handle the fault.
Signed-off-by: Robert Hancock <[EMAIL PROTECTED]>
--- drive
probably a simpler way to test them than -mm right now - applying the
2.6.20-git6 patch on top of 2.6.20 should do it.
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Robert Hancock Saskatoon, SK, Canada
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ng rid of all those
hundreds of "PM: Adding info for" messages in recent kernels..
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Robert Hancock Saskatoon, SK, Canada
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Patrick Ale wrote:
On 2/11/07, Robert Hancock <[EMAIL PROTECTED]> wrote:
Patrick Ale wrote:
> Something unrelated to the tests I am doing.
>
> I found out that the libsata driver doesn't really cope or likes the
> idea that you might have a controller without a master dri
n't use supend, the reason
is that it doesn't work reliably, quite often due to driver issues.
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Robert Hancock Saskatoon, SK, Canada
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/driver/OS is allowed to support, but it
is not required to.) A single drive should always be set to master (and
connected to the end of the cable and not the middle, by the way).
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