The following policies are in effect regarding data on SEASnet servers and on user machines that have backup support from SEASnet. These policies apply to both your electronic mail and filesystem data.
These policies are designed to ensure that accidentally deleted data may be retrieved, if necessary, for a reasonable period of time and provide individuals with a clear time table concerning retention of their data. SEASnet recognizes that it is important for users to know that their data is restorable in the event of accidental or catastrophic data loss, but also that data is not being retained beyond a useful period of time.
SEASnet provides snapshots of data and email maintained on our servers. "Snapshots" are taken at various intervals during each 24 hour period (see schedule below). Snapshots taken of users data files allow the user to restore data accidentally deleted from their account without intervention from SEASnet (Note: this is only possible with data files - SEASnet staff must intervene for all email restorals). SEASnet maintains approximately one to two weeks worth of snapshots. Step-by-step instructions for restoring deleted files can be found here.
| Backup Level | Frequency | Storage | Retention |
|---|---|---|---|
| Incremental | Daily (Mon-Fri) | On-line/tape | 8 weeks |
| Super incremental | Weekly (Sat) | Tape | 1 year |
| Full backup | Monthly | Tape | 1 year |
| Backup Level | Frequency | Storage | Retention |
|---|---|---|---|
| Full backup | Daily AM (M-F) | On-line | 2 weeks |
| Super incremental | Daily PM (M-F) | Tape | 3 months |
| Full backup | Twice Daily (Sat/Sun) | On-line | 2 weeks |
| Full backup | Every Friday (PM) | Tape | 3 months |
| Times | Frequency | Storage | Retention |
|---|---|---|---|
| 9am-11pm | Every two hours | On-line | 24 hours |
| Midnight | Every day | On-line | 8 days |
| Midnight | Weekly (Sun) | On-line | 2 weeks |
THESE POLICIES ARE NOT A GUARANTEE THAT DATA WILL NOT BE RETAINED, EITHER INTENTIONALLY OR ACCIDENTALLY, BEYOND THE TIME PERIODS LISTED ABOVE.