Disk Storage Service
Ratings
|
Rating Scale: 5 is highest
1 is lowest |
| Disk Storage |
Criteria |
Attributes |
Rating (1 is low and 5 is High) |
| Resilient Premium Storage |
Performance |
- fibre channel connected disk provides
best through put |
5 |
|
Resilience |
- data is duplicated in real time at two
sites, meaning you can lose either multiple disks or a complete site
and still have access to the data |
5 |
|
Recoverability |
- very good disaster recovery for data storage as data is active and current at multiple sites
- replicating the data does not protect against data corruption
- recovering from one disk failure has little impact on performance |
4 |
|
Vendor Support |
- IBM with a solid support structure
- 24 by 7 support |
5 |
|
Overall |
|
19 |
| |
|
|
|
| |
|
|
|
| Resilient Standard Storage |
Performance |
- Serial ATA technology is used and is reported to have slightly lower through put than Fibre Channel disk. Claims of being slower are being debated in the industry as some companies have not found this. SATA will be suitable for many applications. |
4 |
|
Resilience |
- data is duplicated in real time at two sites, meaning you can lose either multiple disks or a complete site and still have access to the data |
4 |
|
Recoverability |
- very good disaster recovery for data storage as data is active and current at multiple sites
- replicating the data does not protect against data corruption
- recovering from one disk failure has little impact on performance |
4 |
|
Vendor Support |
- smaller vendor with less support structures
- support is 9 - 5, 5 days a week |
3 |
|
Overall |
|
15 |
| |
|
|
|
| |
|
|
|
| Premium Storage |
Performance |
- fibre channel connected disk provides higher performance |
5 |
|
Resilience |
- data loss will occur if you lose more than one disk at the same time or the site, which would then require recovery from the backup / recovery system. |
3 |
|
Recoverability |
- should severe failure occur, data would need to be restored from the backup & recovery system. How long the data will be unavailable depends on the options selected for backup & recovery. |
3 |
|
Vendor Support |
- IBM with a solid support structure
- 24 by 7 support |
5 |
|
Overall |
|
16 |
| |
|
|
|
| |
|
|
|
| Standard Storage |
Performance |
- Serial ATA technology is used and is reported to have slightly lower through put than Fibre Channel disk. Claims of being slower are being debated in the industry as some companies have not found this. SATA will be suitable for many applications. |
4 |
|
Resilience |
- data is stored at one site.
- one disk can fail without losing access to your data
- SATA disk use the same technoloogy as PC disk. Failure rate is reported to be slightly higher than premium but the probability of losing two in one data set at the same time is very low |
2 |
|
Recoverability |
- should severe failure occur, data would need to be restored from the backup & recovery system. How long the data will be unavailable depends on the options selected for backup & recovery. |
3 |
|
Vendor Support |
- smaller vendor with less support structures
- support is 9 - 5, 7 days a week |
3 |
|
Overall |
|
12 |
|
|
|
|
|
|
|
|
