The shell session is when I logged in to boot it back up. No console on the system — not used to needing console logging on modern computers. One interesting thing now that I am looking, is that the system that was rebooting has -far- more events in the SP log than the other two.
Over the past few years, I have received a lot of messages and comments about this post. This was the point I was trying to make. The daily work for the year is stored on an external 5TB drive. That drive is backed up daily using Time Machine. Every month or so depending on workload the backup is backed up to a WD My passport Drive and that copy is moved offsite to a safe deposit box.
Past years are stored on two WD My passport Drives. One in a waterproof Pelican case at home and the other in the safe deposit box. All worked up images are also stored on PhotoShelter.
Photographers acquire A LOT of images, and that translates to terabytes of data that need to be saved and protected. One of the first things to remember is that an archive and a backup are NOT the same. RAID is not backup. The terms 1-disk or 2-disk redundancy refers to the number of drives that can fail with the array remaining usable.
There are many different types of RAID configurations: RAID 0 spreads the data across multiple drives. For example, block A is on drive 1, block B is on drive 2and this permits increased write and read speeds.
This is called striping. RAID 0 offers no protection against drive failure, since this mode does not write any duplicate or parity information. This mode writes and reads the same data to pairs of drives which is called mirroring.
If either drive fails, you can continue working with the other until you can replace the bad one. This mode is about both speed and redundancy. RAID 5 writes and reads from multiple disks, and it distributes parity data across all the disks in the array.
Parity data is a smaller amount of data derived mathematically from a larger set that can accurately describe that larger amount of data, and thus serves to restore it.
Since parity information is distributed across all the drives, any drive can fail without causing the entire array to fail. RAID 5 needs a minimum of three disks to implement.
Since data is read from multiple disks, performance can improve under RAID 5. This makes RAID very good for video editing systems. RAID levels 2, 3, and 4 are not commonly used anymore. So if you accidentally delete a file, it will instantly be removed from both mirrored copies.
If your disk is corrupted by a software bug or virus, the corruption will be done to both mirrored copies simultaneously. Having all the drives in one box that is being served by one power supply and controller has its problems too. A bad enough power surge will probably fry all disks in the RAID.
If your house burns down… well, you get the point. A RAID is still a single device and because of that, also a single point of failure. None of this means you should not use a RAID. Proper backup software will perform a full backup and then hourly or daily backups of changed files.
The drive is also plugged into its own surge protector. This software does not mirror the primary drives but backs up files and changed files.
This gives you the opportunity to go back and recover something that may have been accidentally deleted. Images that are worked up for publication are exported from Adobe Lightroom and stored on my Photoshelter Archive.
I trust Photoshelter and their geographically redundant archive to protect those images. If disaster were to strike, I could still export the images again from the backed up Lightroom archive.
These images are also backed up on the primary backup drive. Every year I rotate the oldest year off to a small portable drive.Operations Run Book for Enter Client’s Name Here Version: Date Created: The most recent backup version is retained for as long as the original file is on the client file system.
All other versions are retained for up to 30 days after they become inactive. Copies are made of daily scheduled backups. Disaster Recovery Manager (DRM. Administration Guide. The guide describes various administration tasks that are typically performed after the installation.
The guide also introduces steps to integrate Ceph with virtualization solutions such as libvirt, Xen, or KVM, and ways to access objects stored in the cluster via iSCSI and RADOS gateways..
Book “Deployment Guide”. Administration Guide. The guide describes various administration tasks that are typically performed after the installation. The guide also introduces steps to integrate Ceph with virtualization solutions such as libvirt, Xen, or KVM, and ways to access objects stored in the cluster via iSCSI and RADOS gateways..
Book “Deployment Guide”. Operations Run Book for Enter Client’s Name Here Version: Date Created: The most recent backup version is retained for as long as the original file is on the client file system.
All other versions are retained for up to 30 days after they become inactive. Copies are made of daily scheduled backups. Disaster Recovery Manager (DRM.
At my day job, we purchased 3 Sun (er, Oracle) ’s (part of their ‘Unified Storage’ platform; the machines are X’s with their specialized Unified Storage OS) .
View and Download Quantum DXi user manual online. DXi Storage pdf manual download.