Permission probleme & question

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Permission probleme & question

Post by OnAnyPoint » Thu Nov 01, 2012 4:21 pm

Hi,
I apologize directly for my english, I come from switzerland.

I am trying to put a Usb key (8GB) under ZFS to try it out. So I just did it with the quiet good explanation and a little research on the forum. But one porbleme juste arrise, I can not write to the usb stick...

"Impossible de déplacer l’élément « test.jpeg » » car « USB » ne peut pas être modifié." so basicly it said that it can not move the "test.jpeg" because "USB" can not be modify.
I tried to change the permission on the disk but it didn't work...

When I do the "ls -l /dev/dsk/":

total 8
lrwxr-xr-x 1 root wheel 12 1 nov 19:32 GPTE_ACC137A1-11FC-4A51-8962-89446ACBC79A -> /dev/disk2s2


An other question ( I think it's better if I ask all the questions in the same post ;) )

I have a macpro with 4*1TB in raid 0, I was thinking of changing my setup to 1*256GB SSD + 3*1TB in raid 0. Will it be a good idea to make the 3*1TB a Raid under ZFS? I do a lot of digital photography and animation and search the best way to reinstall my setup.

if somebody can help me, a new academic in comunication and computer science will be very thankful :)
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Re: Permission probleme & question

Post by dbrady » Thu Nov 01, 2012 5:57 pm

You may have inadvertently created the pool using root privileges.

You can check the ownership of your zfs file system using the following:

Code: Select all
$ ls -l /Volumes/
. . .
drwxrwxr-x  22 root   admin    25 Sep 28 23:01 zevo
. . .


If your zfs file system is owned by root (as seen in the example above), you can change the ownership to your user account as follows:

Code: Select all
$ sudo chown <your-user-name> /Volumes/<your-zfs-filesystem>

where <your-user-name> and <your-zfs-filesystem> are substituted with your actual values.
Hope this helps.
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Re: Permission probleme & question

Post by grahamperrin » Thu Nov 01, 2012 10:08 pm

OnAnyPoint wrote:… macpro with 4*1TB in raid 0, I was thinking of changing my setup to 1*256GB SSD + 3*1TB in raid 0. Will it be a good idea to make the 3*1TB a Raid under ZFS? I do a lot of digital photography and animation …


Considering RAID-Z with and without an SSD … in the general discussion area, at least two topics should be useful:

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Re: Permission probleme & question

Post by grahamperrin » Fri Nov 02, 2012 2:51 am

dbrady wrote:… inadvertently created the pool using root privileges …


In at least one use case,
zpool create …
requires superuser privileges, then the file system dynamically mounted by ZEVO is not writeable by the logged in user (presumably owned by root).

In the movie at http://www.wuala.com/grahamperrin/publi ... de=gallery this is seen between 01:30 and 03:10 on the timeline.

(The later part of that screen recording, and other files in that area, relate more to CoreStorage than to ZEVO.)
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Re: Permission probleme & question

Post by OnAnyPoint » Sun Nov 04, 2012 2:22 pm

Hi,
thanks a lot for your quick reply!

As I said, I am thinking about changing my setup and after some reflexion I think about going for that:
Image
( In green the hard drive I already own)

But after some reading I am a bit lost... ZFS seems very promising but I don't know which is the best way to integrate it on my "soon" new setup. I start reading about L2ARC and the fusion drive "hack" all of that seems very good!

I am using a mac pro hexacore 3.2ghz from 2009 and planning to use two USB3/E-sata 5 bay for the external and backup storage.

So what do you think? Am I on the right way? :)
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Re: Permission probleme & question

Post by grahamperrin » Sun Nov 04, 2012 3:30 pm

OnAnyPoint wrote:… Am I on the right way? :)


JHFS+ instead of ZFS for the system volume.

Consider improving the percentage of total space given to backups; plan for capacity to allow incremental backups into the distant future without the need to weed too many old backups.

More generally, in Ask Different: One mac, Two or more storage devices - how to divide things?
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Re: Permission probleme & question

Post by TomUnderhill » Mon Nov 05, 2012 1:28 pm

OnAnyPoint wrote:But after some reading I am a bit lost... ZFS seems very promising but I don't know which is the best way to integrate it on my "soon" new setup. I start reading about L2ARC and the fusion drive "hack" all of that seems very good!

I have a MacPro3,1 (2x 3.0GHz quad-core Xeons), 24GB RAM, Dual video cards - three panels (2x 20" and 1x 30"), 1x 128GB SSD (JHFS+ boot) and a 4TB volume sitting on a 3x2TB RAIDZ with a 64GB SSD sitting as a L2ARC. I power down my machine at night to save power.

With my daily driving (and a bit of empirical testing) and rebooting, I'm not seeing any advantage with a L2ARC because ZFS treats it exactly as "more ARC"... volatile RAM with no content preservation.

Unless you run you system 24/7, have consistent read patterns, I wouldn't waste time with L2ARC. Instead, I'm looking more into working a Fusion Drive into my system... somehow!

Hope this helps a bit.
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Re: Permission probleme & question

Post by hadriya9091 » Mon Mar 04, 2013 1:38 am

Hi i am newbie here , I like this forum , It's very nice and informative , It's also very benefited for us.i am personally impressed to join this forum … really thanks to provide me this kind of friendly atmosphere.
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