Just a short info:
I installed a PDP Patriot 32GB/class10 micro sdhc card in my N900, created a 768MB primary swap partition and formatted the rest with ext2.
I believe my N900 is a bit more responsive now but that might just be wishful thinking. (I'm aware of the "fresh reboot effect".)

Some hard facts:
These are the results of copying 1GB of 1kB blocks from /dev/zero:This is copying 1GB of 1kB blocks from the mass storage to /dev/zero:emmc in both cases means the ext3 formatted /home/user.

btw: Not sure if it has to do with the file system or my operating system but I noticed that when I connect the N900 to my PC (running Debian Squeeze) in mass storage mode both my MyDocs partition and the ext2 partition on the sdhc can be mounted. But if I do they are not unmounted on the N900. So I can access these partitions from both systems simultaneously.

Know, bit old, but copying 400mb in 37.5k source files is a bit like 1k test and got 300kb/s on it (rising from 130 at start), samsung sdhc 10class really seems to be a new kind of 10.

EDIT: just for reference 700MB file at 10MB/s
further edit: http://forums.whirlpool.net.au/archive/1582172 thread where it is claimed to get ~800kb, so far dreams it seems, or just winphuck, still only class 10 card coming close to the top when it comes to random readwrites

so what are the process to increase the virtual ram. i bought a 2gb micro sd card. will my device get faster? please tell me the procedure.

can anyone please guide me. i bought the sd card. i need help before i can use it as a virtual ram. plzzz.anyone.

This post summarizes pretty well what you'll have to do:
http://talk.maemo.org/showpost.php?p...&postcount=106

Hi all,

I am trying to setup my 16GB class 2 micro sd card as a secondary swap on my N900, i followed instructions from the wiki page http://wiki.maemo.org/Swap_on_microS...d_for_swapping.

Since I dont have a linux machine i am trying to configure my microSD for swapping from n900 terminal.

I am using fdisk for this purpose. However I am running into problems. Following is the set of steps i am doing.

EDIT: Fixed after the follwing 3 additional steps to be performed in the end:
> umount /dev/mmcblk1p1
> mkfs.vfat /dev/mmcblk1p1
> mount /dev/mmcblk1p1 /media/mmc1

Are the below steps correct. I am unable to see the 15.5 gig partition on my Windows machine.

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 1
First cylinder (1-486192, default 1): Using default value 1
Last cylinder or +size or +sizeM or +sizeK (1-486192, default 486192): +15500M

Command (m for help): p

Disk /dev/mmcblk1: 15.9 GB, 15931539456 bytes
4 heads, 16 sectors/track, 486192 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Device Boot Start End Blocks Id System
/dev/mmcblk1p1 1 473023 15136728 83 Linux

Command (m for help): n
Command action
e extended
p primary partition (1-4)
p
Partition number (1-4): 2
First cylinder (473024-486192, default 473024): Using default value 473024
Last cylinder or +size or +sizeM or +sizeK (473024-486192, default 486192): Using default value 486192

Command (m for help): p

Disk /dev/mmcblk1: 15.9 GB, 15931539456 bytes
4 heads, 16 sectors/track, 486192 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Device Boot Start End Blocks Id System
/dev/mmcblk1p1 1 473023 15136728 83 Linux
/dev/mmcblk1p2 473024 486192 421408 83 Linux

Command (m for help): t
Partition number (1-4): 1
Hex code (type L to list codes): c
Changed system type of partition 1 to c (Win95 FAT32 (LBA))

Command (m for help): t
Partition number (1-4): 2
Hex code (type L to list codes): 82
Changed system type of partition 2 to 82 (Linux swap)

Command (m for help): p

Disk /dev/mmcblk1: 15.9 GB, 15931539456 bytes
4 heads, 16 sectors/track, 486192 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Device Boot Start End Blocks Id System
/dev/mmcblk1p1 1 473023 15136728 c Win95 FAT32 (LBA)
/dev/mmcblk1p2 473024 486192 421408 82 Linux swap

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table
Nokia-N900:~#

What do you mean by "not seeing from my Windows machine"?
Can you write from N900 to that partition?
Did you format (mkfs)? And maybe fsck it afterwards?

I just figured out that i missed mkfs.. its working now. Edited my post for other who need this info. I will see if we can add this steps to wiki in the "Configure Micro SD for swap from n900 terminal" section