This is topic Replacing a Hard Drive Disk on a DCP 2000 in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.
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Posted by Frederick Lanoy (Member # 5416) on 02-05-2011, 10:57 AM:
Hello everybody,
When you replace a HDD on a DCP 2000 (more generally on all digital cinema's servers), you have to put a HDD of the same size to rebuild the RAID. Doremi has a list of all HDD that can fit into their products.
My question is : can you put a HDD of different manufacturers ? For example, the disk to be replaced is a Samsung HE103UJ (1000 GB). I can't find it on the market. Can i put an 1 TB Hitachi reference 0A35722 (it's on Doremi's list "HDD approved") ? Is it a problem for the server or is it OK ?
Thanks for your answer.
Posted by Brad Miller (Member # 2) on 02-05-2011, 12:56 PM:
Its not ideal, but yes it will work.
If you have multiple DCP2000s in your multiplex, it would be smarter to put 4 new Hitachis in there and hold onto the 3 good Samsungs to use as backups or your other servers.
Posted by Frederick Lanoy (Member # 5416) on 02-05-2011, 02:00 PM:
Thank you Brad
Posted by Kris Verhanneman (Member # 5562) on 02-06-2011, 03:21 AM:
Brad,
if you change all the drives at once you can't use the rebuild procedure?
What would you suggest to creat a new raid?
Swapping the drives one by one and applying the rebuild on each drive swapped or running a full install (with software that most projection room don't have)?
Posted by Dave Macaulay (Member # 813) on 02-06-2011, 08:59 AM:
If you replace all three hard drives you will no longer have any content so you can't rebuild the RAID to recover content - that's basically what the rebuild is for. Call Doremi support for the procedure to initialize the RAID with all three drives replaced, I don't remember it. This will cause lots of problems with content though. You will lose all content. Including the "factory" content you need to build a playlist. Better to replace one drive at a time and rebuild the RAID after each new drive is installed. At the end of this all-day process you should have 3 new drives and all content retained.
Any same-size drive on the supported drives list will work. It's slightly "better" to have all three the same exactly but the server will not have a problem with mixed brands.
Posted by Brad Miller (Member # 2) on 02-06-2011, 01:06 PM:
Personally I prefer to start clean, but Dave has a good point regarding content. Note if you DO start clean, the library (if you have one) will have issues claiming the content isn't on that server, when it really is. The problem will fix itself as those movies leave the building and new ones are brought in.
Posted by John Gavin (Member # 5949) on 02-09-2011, 02:05 AM:
All the disks in an array need not be the same type, but they
should have at least the same capacity, performance ( or better )
and be a Doremi approved drive.
Personally, I like to keep servers with the same type drives
( manufacturer, model number and firmware ) but that is not
always possible.
Concerning creating a new raid array. Software 2.0.10 and higher
has a new diagnostics tab. Go to the STORAGE tab, then select
REPAIR and you will see the REINITIALIZE option. Select this to
create a new raid set on new drives ( if you use an existing raid
set ALL THE DATA WILL BE DESTROYED - TAKE CARE ).
Posted by System Notices (Member # 2357) on 05-30-2013, 04:04 AM:
It has been 841 days since the last post.
Posted by Mohd Ridzuan (Member # 7054) on 05-30-2013, 04:04 AM:
Hi All,
I'm new in this forum n would like to meet more peoples to gain more my experinece n knowledge in this cinema field. I'm also know this topic are way to long back, but now it seem to be useful for me..
I had a DCP2000 doremi server
Fw version 30.05q
sw version 2.2.5-0
SM version 5.0.19-0
there were message in yellow shown that
Raid Status /opt (md1): degraded
device status unknown online
is there anyone know how to solve it.
much appreciate of ur kindness and million thank you in advance
Mr. Wan
Posted by Carsten Kurz (Member # 5396) on 05-30-2013, 07:16 AM:
Do you have access to the Doremi manuals? You can download them from Doremis website.
First thing is to do a consistency check on the RAID to repair possible software errors. If that doesn't solve the problems, you need to find out wether a disc has hardware issues and needs to be replaced, by looking at disc diagnostics.
Check this manual for RAID maintenance procedures:
http://www.doremilabs.com/downloads/manuals/DCP-2000_and_DCP-2K4_Field_Installer_Manual_001659_v1_2.pdf
- Carsten
Posted by Dave Macaulay (Member # 813) on 05-30-2013, 07:35 AM:
In "diagnostic tools", "storage", you can check individual drives and analyze the RAID status.
Basically you can get a replacement drive (from the Doremi approved drive list) of the same size (probably 1Tb). Then power down, remove the dead drive caddy and put the new drive in the caddy. Then just put the drive in and power up, the RAID will rebuild itself with the new drive - that takes a while but you can play content while its doing it.
If you do replace all the drives then all your content will have to be reingested. The "standard content" test stuff can be found on the Doremi ftp site.
Note that there is new Doremi firmware for the Showvault/IMB - 30.07c-1 - which solves a few issues, particularly one that occasionally gives you a no-image show on the first run after powerup. Plus the HDMI input is supposed to work with fewer problems, I haven't tried that yet.
Posted by Gavin Lewarne (Member # 5397) on 05-30-2013, 03:05 PM:
slightly off topic -
In theory, could you replace all the drives by swapping them one at a time doing a rebuild after each one and keep content?
Posted by Carsten Kurz (Member # 5396) on 05-30-2013, 04:41 PM:
Yes. But in case you think of that, you wouldn't gain capacity by replacing one-by-one with larger harddiscs - the smallest disc will limit all new drives to it's same size during every rebuilt and the overhead size will remain invisible.
Only if you delete/reinitialize the RAID completely would you gain access to the full disc capacity.
-Carsten
Posted by Danial Simmonds (Member # 4638) on 05-31-2013, 01:39 AM:
Normally what i would do in the event of any error related to storage or raid, is start of by checking the smart ctl status through the terminal on the doremi server.
From SMART status we can see which hard drive has an issue with reallocated sectors or UDMA errors and so on. This would be a more accurate way. Also with the new Doremi Software it will have an alert message when SMART value was to change on a particular hard drive.
So in the case when the hard drive has a SMART error, we will replace that hard drive regardless if the damage is small or not, because movie playbacks depends on the hard drives.
Just sharing how i do the checks.
Posted by Mohd Ridzuan (Member # 7054) on 05-31-2013, 09:29 AM:
Thank you all ur kindness information guys. Carsten, Dave n Danial. tqvm
as now i replaced the top HDD the yellow message shown System degraded no more. thanks guys