On Sun, 29 Apr 2012, Enrico wrote:
thank you Andy for this info
let us know your experience when you'll setup-up the disks
I didn't have any problems at all when I did this. I added the three 4 TB
disks to the system alongside the 250 GB disk it was supplied with and
booted OI 151a off a USB DVD drive after first editing the grub boot
stanza to replace the $ISADIR variable with 'amd64', as OI doesn't
auto-detect the fact that this microserver is fitted with a 64-bit CPU.
At the start of the live image installation, OI correctly detects all 4
disks but reports that only 2 TB of the 4 TB disks is usable if they are
used as boot disks. So I installed to the 250 GB disk and then created
the pool with:
zpool create lapback1 raidz c2t1d0 c2t2d0 c2t3d0
zfs create lapback1/backups
It checks out OK:
andy@lapback1:~# zfs list
NAME USED AVAIL REFER MOUNTPOINT
lapback1 890K 7.13T 202K /lapback1
lapback1/backups 192K 7.13T 192K /lapback1/backups
rpool 4.90G 223G 46.5K /rpool
rpool/ROOT 2.93G 223G 31K legacy
rpool/ROOT/openindiana 2.93G 223G 2.91G /
rpool/dump 959M 223G 959M -
rpool/export 34.2M 223G 32K /export
rpool/export/home 34.2M 223G 32K /export/home
rpool/export/home/andy 34.2M 223G 34.2M /export/home/andy
rpool/swap 1020M 224G 137M -
and:
andy@lapback1:~# iostat -en
---- errors ---
s/w h/w trn tot device
0 0 0 0 c2t0d0
0 0 0 0 c2t1d0
0 0 0 0 c2t2d0
0 0 0 0 c2t3d0
I will be using these servers at a university for automated backups of
user laptops (Windows, Macs, Linux and the odd FreeBSD user) so that 5
minutes after a laptop connects to the network, it either backs up
incrementally or syncs the laptop with the server using rsync. (The
existing service runs on a Sun E450 running Open Solaris 134 SPARC and
fitted with 19 x 300 GB disks in three ZFS pools but we now need more
storage space and 300 GB is the limit for conventional SCSI disks).
I will post any problems I have with this in 'production' here.
Andy
On 04/29/2012 09:24 AM, andy thomas wrote:
On Sat, 28 Apr 2012, Enrico wrote:
did a little research, just because i'm curious about this, my storage
needs
are much lower :)
they say
(http://forums.overclockers.com.au/showpost.php?p=13963218&postcount=4727)
that SB820M south-bridge on n40l has a limit of 3.2tb for hdd capacity.
but
there are no such details on the official specs:
support.amd.com/us/Embedded_TechDocs/47283.pdf
i hope this helps a bit
A comment from a poster called 'AFireInside' on this same forum says AMD
confirms that 4 TB disks will work in the N40L Microserver:
http://forums.overclockers.com.au/showthread.php?s=a97e85a928a1e6997245557220f4b729&t=1009531&page=2
Also, HP's own specifications confirm that this unit is suitable for 4 TB
disks:
http://h18000.www1.hp.com/products/quickspecs/13716_div/13716_div.html
A lot of the comments saying otherwise seem to relate to the earlier N36L
model,
earlier BIOS versions and booting Windows from disks larger than 3.2 TB.
As for using Advanced Format disks with 4K sectors in ZFS pools, the worst
case
scenario would be that these disks can be used in a backwards-compatible
legacy
512 byte sector format but with slower r/w performance. Also, Hitachi
provide a
Windows utility to re-align 4k sectors on their drives although I'm not
sure
whether this would suit OI/ZFS.
Finally, it looks like OI has some support for 4k sector disks:
http://wiki.openindiana.org/pages/viewpage.action?pageId=4883847
and ZFS pools can be created with the 'zpool create block-size 4096 ...'
option.
I'll take the plunge and order a N40L Microserver plus 3 x 4 TB disks and
I'll
post my experiences here.
cheers, Andy
On 04/28/2012 08:39 PM, Enrico wrote:
Hi roy,
yes, right, it was just to tell Andy what I've tested with this hp system
and
OI. i think there are many people who have written in detail their
experience
about supported hdd sizes in forums easily reachable just by googling
n40l. let
me also correct what i've written before: the adaptec 1045/1405 are
luckily
supported by the aac driver, despite what is written on the man page. the
si3124
driver refers to a sata controller i've tested successfully on the pciex1
slot.
Best regards,
Enrico
On 04/28/2012 06:13 PM, Roy Sigurd Karlsbakk wrote:
It probably won't help much. Any SATA controller should recognize the
4TB
drives, and the problem with the drives lying about sector sizes won't
be any
better whatever controller you use.
roy
----- Opprinnelig melding -----
maybe this might help:
http://www.adaptec.com/en-us/products/controllers/hardware/sas/entry/asc-1045/
it is recognized on a n40l and it is supported by the si3124 driver
On 04/28/2012 09:54 AM, andy thomas wrote:
For some time now I've successfully been using ZFS RAIDz pools made
up of 3 x 1
TB or 3 x 2 TB Western Digital Caviar Black disks in a HP
MicroServer N36L
running OI 148 or 151. I'm now thinking of using the newer HP N40L
microserver
with 3 x 4 TB disks (Hitachi DeskStart 7K4000) which have 4096 byte
sectors. Can
anyone foresee a problem with this?
I plan to set up several of these storage servers in mirrored pairs
so I want to
make sure this will work before ordering anything.
Thanks in advance for any comments or advice,
Andy
---------------------------------
Andy Thomas,
Time Domain Systems
Tel: +44 (0)7866 556626
Fax: +44 (0)20 8372 2582
http://www.time-domain.co.uk
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---------------------------------
Andy Thomas,
Time Domain Systems
Tel: +44 (0)7866 556626
Fax: +44 (0)20 8372 2582
http://www.time-domain.co.uk
_______________________________________________
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---------------------------------
Andy Thomas,
Time Domain Systems
Tel: +44 (0)7866 556626
Fax: +44 (0)20 8372 2582
http://www.time-domain.co.uk
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