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» Film-Tech Forum   » Operations   » Digital Cinema Forum   » Doremi 2K4 adding 4th Hard Drive

   
Author Topic: Doremi 2K4 adding 4th Hard Drive
Markus Lemm
Expert Film Handler

Posts: 102
From: Ottawa, Ontario, Canada
Registered: Nov 2005


 - posted 01-07-2014 02:47 PM      Profile for Markus Lemm   Author's Homepage   Email Markus Lemm   Send New Private Message       Edit/Delete Post 
I recently replaced a hard drive on a Doremi 2K4 server. There are 3x 1TB drives and drive b had become degraded. Replaced the drive and rebuild the raid array. All went smooth. I did notice that there is room for a 4th drive. So I added a 4th drive, exactly the same as all the other 3 drives but how do I add it to the array without losing everything? Tried the 'repair' option but only gives me the choice to rebuild losing all data. The drive shows up at boot time in the bios window but there is no sdd drive listed in the diagnostic window.
Any help would be appreciated.

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Stefan Vogels
Film Handler

Posts: 48
From: Aarle-Rixtel, Noord-Brabant, Netherlands
Registered: Jan 2010


 - posted 01-07-2014 03:24 PM      Profile for Stefan Vogels   Email Stefan Vogels   Send New Private Message       Edit/Delete Post 
6.7 Adding the Fourth Drive
The fourth drive cannot be added via the GUI. It must be added using a command line. To add
the fourth drive, follow the directions below:
• Open a terminal window by going to Menu → System → Terminal.
• Log in as a super user.
• Type the following commands, followed by the Enter key:
◦ su <enter>
◦ sh /doremi/sbin/reinit_raid.sh <enter>
• The wizard will show you the current raid size. The default is 3

The wizard will ask for the installed number of disks, enter 4 here. You will lose all content though !

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Carsten Kurz
Film God

Posts: 3779
From: Cologne, NRW, Germany
Registered: Aug 2009


 - posted 01-07-2014 06:22 PM      Profile for Carsten Kurz   Email Carsten Kurz   Send New Private Message       Edit/Delete Post 
There have been reports that adding a fourth drive to a Doremi will increase reliability during simultaneous Play and Ingests/network transfers, TMS operations, etc.. However, conventional straight ingest, USB and CRU, is said to be considerably slower than before.

- Carsten

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