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02-09-2012, 20:47
MercuryV

Quote:

Originally Posted by wpte

Do you guys think it's a good idea to go for a 3TB EXT4 formatted disk?
I'm willing to build myself a special brew firmware with CONFIG_LBD enabled if necessary.

Technically, 3TB disk will work with LBD enabled (there is a success story, in russian) and ext4 support is stable enough (I use ext4 for five months).
But I do not think it's a good idea - to use a high capacity drive on router at low speed. You decide :)
02-09-2012, 22:05
wpte

Quote:

Originally Posted by MercuryV

Technically, 3TB disk will work with LBD enabled (there is a success story, in russian) and ext4 support is stable enough (I use ext4 for five months).
But I do not think it's a good idea - to use a high capacity drive on router at low speed. You decide :)

I don't care too much about the speed thing, that'll be allright:p
But tbh, why not enable LBD by default? I mean EFI is enabled by default, to support GPT.
Obviously it adds a little extra size, but not that much imho.
02-09-2012, 22:45
MercuryV

Quote:

Originally Posted by wpte

But tbh, why not enable LBD by default? ... Obviously it adds a little extra size, but not that much imho.

lly wrote that CPU load is slightly increased too
02-09-2012, 22:58
wpte

Quote:

Originally Posted by MercuryV

lly wrote that CPU load is slightly increased too

hmm... that's indeed a downside.
I might consider a 2TB disk then... too bad the price/gb is a lot higher for those drives:p
02-09-2012, 23:14
MercuryV

Quote:

Originally Posted by wpte

I might consider a 2TB disk then... too bad the price/gb is a lot higher for those drives:p

Can you buy 3TB HDD with a sort of money-back guarantee?
02-09-2012, 23:38
wpte

Quote:

Originally Posted by MercuryV

Can you buy 3TB HDD with a sort of money-back guarantee?

In the Netherlands we have a law for online shopping.
You can return something until 14 days after you received it, no questions asked. You might have to pay refurbishment costs if you scratch it or something though:p
If I want to return it, it's going to take a long long time with dban though:D
02-09-2012, 23:48
MercuryV

Quote:

Originally Posted by wpte

In the Netherlands we have a law for online shopping.
You can return something until 14 days after you received it, no questions asked.

Then try and share results :)
03-09-2012, 12:46
wpte

Quote:

Originally Posted by MercuryV

Then try and share results :)

Still need to wait for it to be in stock again... almost 2 weeks till it is.
I was looking at this bad boy btw: http://www.wdc.com/en/products/products.aspx?id=240
13-10-2012, 18:14
wpte

I'm playing around with EXT4 a bit, and I received this kernel error:

Quote:

Oct 13 19:10:45 kernel: Call Trace:
Oct 13 19:10:45 kernel: [<80266a18>] dump_stack+0x8/0x34
Oct 13 19:10:45 kernel: [<800a0fc0>] __getblk+0x310/0x320
Oct 13 19:10:45 kernel: [<800a1038>] __bread+0x1c/0x1ac
Oct 13 19:10:45 kernel: [<c02cc434>] ext4_group_desc_csum_verify+0x61c/0x2e18 [ext4]
Oct 13 19:10:45 kernel: EXT4-fs (sdc1): unable to read superblock

using r4680

I created the partition like this:

Quote:

mke2fs -t ext4 /dev/sdb1

on the router.

I tried to make the ext4 partition with gparted :p
and it uses the command:

Quote:

mkfs.ext4 -j -O extend -L "" /dev/sdb1

Also gave me the same error.

Either way the drive shows up at my pc correctly and is usable

edit:
on r4656 it seems to work. I'll try higher revisions tomorrow
14-10-2012, 11:04
lly

Quote:

Originally Posted by wpte

I'm playing around with EXT4 a bit, and I received this kernel error:

using r4680

Probably it broken in r4667. Backport can be incomplete :(
Try to remove kernel-2.6/150-fs-ext4-updates7.patch before kernel tree prepare. Please report if it help.
14-10-2012, 13:32
wpte

Quote:

Originally Posted by lly

Probably it broken in r4667. Backport can be incomplete :(
Try to remove kernel-2.6/150-fs-ext4-updates7.patch before kernel tree prepare. Please report if it help.

Yes, with kernel-2.6/150-fs-ext4-updates7.patch removed it seems to work fine.
I've just compiled the modules, and loaded them up.

When I place the modules in /opt/lib/modules/2.6.22.19 it even automatically modprobes them, nice :)
I did unload the old modules by rmmod ext4, crc16 and jbd2.

I must say I like ext4 on the router so far. It seems to give a better performance in big file and directory situations. In ext3 it takes a long time to even list the files for some reason.
Also I was able to get about 0.5MB/s extra speed trough samba.

Eventually I want to move my /opt partition onto a ssd (with mlc memory) to save some energy and make my harddisk live a bit longer.
05-11-2012, 17:35
wpte

So I've bought a 4TB harddrive: http://www.wdc.com/en/products/products.aspx?id=870
I formatted it with EXT4 under linux mint 13 with kernel 3.5.3 with gparted. I rounded the sizes to MiB.
When I plugged it in my RT-N16 it was just plug and play, it instantly worked:D

now I just need to wait for my 950GB to transfer to my new drive :p
06-11-2012, 16:50
wpte

I've transferred over 400GB already, but I did noticed some hiccups.
EXT4 seems to work well overall, good performance etc.
But after a while (seems almost random) I get a segmentation fault in cp, the drive becomes inaccessible and the router is not able to umount it, even when the drive is removed.
I don't see any oops, maybe I should turn extra debugging on?
The router is also not able to reboot after the segfault.

I'm using r4695 btw.
06-11-2012, 16:57
staticroute

Quote:

Originally Posted by wpte

I've transferred over 400GB already, but I did noticed some hiccups.
EXT4 seems to work well overall, good performance etc.
But after a while (seems almost random) I get a segmentation fault in cp, the drive becomes inaccessible and the router is not able to umount it, even when the drive is removed.
I don't see any oops, maybe I should turn extra debugging on?
The router is also not able to reboot after the segfault.

I'm using r4695 btw.

Only debugging can help. Did you try the same on regular Linux workstation or Windows?
06-11-2012, 18:36
wpte

Quote:

Originally Posted by staticroute

Only debugging can help. Did you try the same on regular Linux workstation or Windows?

Yes I did a full check (sector by sector) of the drive before I dumped all my data on it;)
I'm copying again, and I have a bit of a nasty memory leak feeling.
If it's a leak, the leak is probably small because the used memory is increased bit by bit very slowly.

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