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Author Topic: ext2 or ext3  (Read 4996 times)

Aquilae

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ext2 or ext3
« on: March 31, 2009, 03:47:34 PM »

Hi,

What are the exact benefits/drawbacks in using either ext2 or ext3 specifically with the DNS-343?

"Best performance/Most stable" does not really contain enough details to make an informed decision.

I am aware of the differences between the two file systems in terms of journalling/etc, but what level of testing has been placed on using the two different filesystems with the DNS-343?

The ext3 filesystem seems to be a new addition to the DLink DNS series.
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krueger86

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Re: ext2 or ext3
« Reply #1 on: April 05, 2009, 01:51:00 PM »

I would like to know as well.   I have setup my DNS-343 with the ext3 file system.  With 4 Seagate 1TB drives.  I have been trying to copy about 700 GB of data for days now.  I first tried using the download utility of the 343 and it did not copy all the data and stopped transferring.  I lost power at the house and then tried to do a incremental backup and it was not progressing.  So now I am trying to push the data using Allways Sync and that is taking forever.  I know that there are a lot of variables.   

But I am noticing some hiccups with the 343.  Like the front displays stating an IP of 192.168.0.32 when the easylink utility shows a IP of 192.168.0.106 and I can connect to the drive using the same IP.  Powered down and it then read correct IP. 

I wanted to test the RAID so I powered down and pulled a drive.  I had setup the 343 to email me when a drive failed.  Powered the unit back up and it did not send an email.  Reported that the RAID was degraded.  I then sent test email from the unit and it sent just fine.  I put the drive back in and it states that it is in the process of doing a 774 minute sync.  That is 12.88 hours.  A long time in my opinion.  But, I am new to these units and want to make sure that my data is safe.

Sorry I do not mean to hijack this thread.  If it needs to be moved please let me know.

Thanks,
Krueger86
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Fatman

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Re: ext2 or ext3
« Reply #2 on: April 06, 2009, 08:14:50 AM »

Sorry I do not mean to hijack this thread.  If it needs to be moved please let me know.

I am not the mod here, but I would start a new thread if you want your non filesystem question points addressed.

The reason I didn't answer this before is because I didn't quite understand the original posters confusion, so I will spell it out for everyone since I guess I was the confused one.

EXT3 is EXT2 with a journal

a journal allows quicker (and more reliable) filesystem recovery in case of a unexpected unmount (like losing power).

Thats it!

My personal recommendation is that everyone use EXT3 every time for every job.  The performance cost of writing a journal is unnoticed in a network appliance such as this, and HDs are not as access sensitive as say flash where you would want to avoid the extraneous reads and writes.
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non progredi est regredi

krueger86

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Re: ext2 or ext3
« Reply #3 on: April 06, 2009, 02:10:36 PM »

Thanks, that is a little clearer.  I will post the rest in a new thread.
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