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N900 is not recognizable on any of my devices (windows 10,7, xp) What can I do? (1)
to Nokia N900 by nieldk - 4 days, 1 hr ago - more...
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2010-09-22
, 11:32
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Posts: 115 |
Thanked: 43 times |
Joined on May 2010
@ UK, London
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#72
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Originally Posted by rewt
Hello.
For those who need more VM, and wish to use their entire MicroSD card for this purpose:
(WARNING: This will erase the entire MicroSD card, or worse, some or all of your internal memory if you mistype the device name.. If you plan to proceed, I recommend that you have some idea what you are doing)
In x-term:
The last line will have to be rerun each time your device is rebooted, unless you add an init script to run it.Code:sudo gainroot mkswap /dev/mmcblk1p1 swapon /dev/mmcblk1p1
I have installed Nitdroid on my Micro-SD card, and Nitdroid has partitioned my Sd card and I have approx 2GB free. Can I use these 2GB as 'virtual ram'? Thanks
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2010-09-24
, 15:29
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Posts: 692 |
Thanked: 264 times |
Joined on Dec 2009
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#73
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Hey, I got an idea, I thought I'd get a second opinion before trying it through.
To work around Maemo 5's swapon's inability to mount swap files with a specific priority, what if we copy Debian's swapon tool to /usr/sbin/debswapon, and change genfstab.awk to use that instead? Seems like it should work.
Edit: Did some experiments and the Debian swapon won't run on Maemo that easily.
Last edited by GameboyRMH; 2010-09-24 at 18:53.
To work around Maemo 5's swapon's inability to mount swap files with a specific priority, what if we copy Debian's swapon tool to /usr/sbin/debswapon, and change genfstab.awk to use that instead? Seems like it should work.
Edit: Did some experiments and the Debian swapon won't run on Maemo that easily.
__________________
"Impossible is not in the Maemo vocabulary" - Caballero
"Impossible is not in the Maemo vocabulary" - Caballero
Last edited by GameboyRMH; 2010-09-24 at 18:53.
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2010-10-12
, 09:10
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Posts: 4 |
Thanked: 0 times |
Joined on Oct 2010
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#74
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i just create startup script using this command :
Start on started hildon-desktop
stop on starting shutdown
console none
service
script
sleep 60
swapon /dev/mmcblk1p2
end script
and put it under /etc/init.d but still not working after reboot....
why???
Start on started hildon-desktop
stop on starting shutdown
console none
service
script
sleep 60
swapon /dev/mmcblk1p2
end script
and put it under /etc/init.d but still not working after reboot....
why???
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2010-10-17
, 11:29
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Posts: 32 |
Thanked: 24 times |
Joined on Sep 2010
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#75
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OK, here is another way to enable both swap partitions, this way the faster microSD partition has the higher priority - only using the internal swap when it becomes full.
I've only started messing around with this Linux stuff, so if I'm wrong your comments are welcome. However it really seemed to have worked for me, I had setup a solitary swap of about 350MB and started to get sporadic low memory warnings (but conky did not show any problems), especially when using firefox with a bunch of other apps opened at the same time. After doing this I cannot recreate the memory warnings no matter how hard I try
Simply this:
Checking
From the above you can see the swap on the microSD is higher priority than the one on the internal, and so should in theory be used consecutively when the partition on the removable card becomes full.
I've only started messing around with this Linux stuff, so if I'm wrong your comments are welcome. However it really seemed to have worked for me, I had setup a solitary swap of about 350MB and started to get sporadic low memory warnings (but conky did not show any problems), especially when using firefox with a bunch of other apps opened at the same time. After doing this I cannot recreate the memory warnings no matter how hard I try
Simply this:
Code:
swapon /dev/mmcblk1p2
swapoff /dev/mmcblk0p3
swapon /dev/mmcblk0p3
Code:
cat /proc/swaps Filename Type Size Used Priority /dev/mmcblk0p3 partition 786424 0 -2 /dev/mmcblk1p2 partition 359868 476 -1
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2010-10-17
, 11:32
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Posts: 3,664 |
Thanked: 1,530 times |
Joined on Sep 2009
@ Hamilton, New Zealand
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#76
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i've read from YDL that using memory card flash memory as virtual swap Ram will reduce the life of the flash chip by a lot. So I guess it can be done but not the most efficient way to do it.
YDL = Yellow dog linux.
I was planned to use my memory card as SWAP on my PS3 back then.
YDL = Yellow dog linux.
I was planned to use my memory card as SWAP on my PS3 back then.
__________________
Install Preenv games into eMMC| Click Here to get rid of Uboot screen
My N900 running at 250-1150Mhz
Unlocking your FM-transmitter to 76.0Mhz - 107.9Mhz range - CLICK HERE.
Install Preenv games into eMMC| Click Here to get rid of Uboot screen
My N900 running at 250-1150Mhz
Unlocking your FM-transmitter to 76.0Mhz - 107.9Mhz range - CLICK HERE.
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2010-10-17
, 12:30
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Posts: 32 |
Thanked: 24 times |
Joined on Sep 2010
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#77
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Originally Posted by maxximuscool
This is true, there are only a finite number of write cycles each memory block can achieve on a flash device. Modern solid state drives use special algorithms to minimise the amount of times each block is written to, extending the life of the device when used as a main computer drive (with swap).
using memory card flash memory as virtual swap Ram will reduce the life of the flash chip by a lot..
I know that this would not be implemented on the n900's SD, and so placing the swap there will affect the life of the card. However the amount of write cycles has increased massively from what was achievable on early devices where this was a real issue, and we must remember that the default swap on the n900 is also on flash, albeit internal flash.
Actually that is an interesting point - by disabling the internal swap and moving it to the cheaply replaceable microSD, would you be extending the life of your N900?
(This is effectively what I have done, as it only uses the internal swap when the external one is full)
Last edited by elipsoid; 2010-10-17 at 12:37.
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2010-10-18
, 13:10
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Posts: 692 |
Thanked: 264 times |
Joined on Dec 2009
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#78
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I've tried elipsoid's method of setting the MicroSD's swap file priority higher than the internal flash and it definitely is faster. Also it's better to wear out a replaceable microSD than the non-replaceable internal flash storage.
You can also add those swapoff/swapon commands to a startup script, I've done it and it doesn't seem to affect boot time at all.
You can also add those swapoff/swapon commands to a startup script, I've done it and it doesn't seem to affect boot time at all.
__________________
"Impossible is not in the Maemo vocabulary" - Caballero
"Impossible is not in the Maemo vocabulary" - Caballero
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2010-10-18
, 23:53
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Posts: 32 |
Thanked: 24 times |
Joined on Sep 2010
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#79
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I've personally not added my tuning and overclocking stuff to any startup script for fear of an endless reboot nightmare - that is just a personal thing, I know most people have no problems( I run a script from terminal -feels far more geeky
)
Im not sure that these swapon / swapoffs would be fine at startup, as if the microSD is not functional it will return an error at the first step and preserve the onboard swap.
The second step disables the onboard swap though; and I have no idea what would happen if the device has no swap available before it re-enables it in the third step. I do know that the swap is either not used or used very little at all directly after a reebot (hence no difference to startup times as there is very little to copy, takes lot longer if the device has been in use for a while) so it may not matter.
I may have a look at my scrpits and have it check that the card is available before continuing, I'll post back here if I do.
)Im not sure that these swapon / swapoffs would be fine at startup, as if the microSD is not functional it will return an error at the first step and preserve the onboard swap.
The second step disables the onboard swap though; and I have no idea what would happen if the device has no swap available before it re-enables it in the third step. I do know that the swap is either not used or used very little at all directly after a reebot (hence no difference to startup times as there is very little to copy, takes lot longer if the device has been in use for a while) so it may not matter.
I may have a look at my scrpits and have it check that the card is available before continuing, I'll post back here if I do.
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2010-10-19
, 09:52
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Posts: 561 |
Thanked: 75 times |
Joined on Jan 2010
@ Spain
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#80
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Edit the file "/etc/event.d/rcS-late"
seeks the following:
add below:
should look like:
save changes and exit.
Now copy the file genfstab.awk:
Edit "/usr/lib/genfstab2.awk" and leave it like this:
the rest delete it.
Now you can restart, each time you start to check that the microSD has a swap partition and if so will mount.
I'm seeing a more elegant and does not need extra partition or cards.
The manipulation of system files can leave the N900 unusable.
I take responsibility for the results.
I really worked.
Last edited by WhiteWolf; 2010-10-19 at 09:56.
seeks the following:
Code:
sfdisk -l /dev/mmcblk0 | /bin/busybox awk \
-v home_opts="$home_opts" -v fat_opts="$fat_opts" \
-f /usr/lib/genfstab.awk > $tmp_fstab
Code:
sfdisk -l /dev/mmcblk1 | /bin/busybox awk \
-f /usr/lib/genfstab2.awk >> $tmp_fstab
Code:
fstab=/etc/fstab
tmp_fstab=/tmp/fstab
sfdisk -l /dev/mmcblk0 | /bin/busybox awk \
-v home_opts="$home_opts" -v fat_opts="$fat_opts" \
-f /usr/lib/genfstab.awk > $tmp_fstab
sfdisk -l /dev/mmcblk1 | /bin/busybox awk \
-f /usr/lib/genfstab2.awk >> $tmp_fstab
cmp -s $tmp_fstab $fstab || cp $tmp_fstab $fstab
rm -f $tmp_fstab
Now copy the file genfstab.awk:
Code:
cp /usr/lib/genfstab.awk / usr/lib/lib/genfstab2.awk
Code:
#!/usr/bin/awk
BEGIN {
# states so that we don't end up having more than one
# of home or MyDocs; we can have as many swaps as we find
__home = 0
__fat = 0
}
/^\/dev\/mmc/ { start=1 }
start == 1 && $6 == 82 {
printf "%s none swap sw 0 0\n", $1
}
Now you can restart, each time you start to check that the microSD has a swap partition and if so will mount.
I'm seeing a more elegant and does not need extra partition or cards.
The manipulation of system files can leave the N900 unusable.
I take responsibility for the results.
I really worked.
Last edited by WhiteWolf; 2010-10-19 at 09:56.
| The Following 2 Users Say Thank You to WhiteWolf For This Useful Post: | ||
i do install nitdroid last time and i face the same problem with you ,since there was a reply tell us that we should try "/mmcblk1p2"
instead of " mmcblk1p1"
and it work!!