| ID | | Article Title | Post Date |
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387 | 
| How do I replace a failed drive under warranty if I'm in a sensitive/classified environment and can't send the old one back? | Mar-23-10 |
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450 | 
| My storage shows 10% more capacity under OS X 10.6 than under OS X 10.5. Why? | Mar-24-10 |
| With Snow Leopard (10.6), Apple adopted the standard usage of terabyte (TB) which equals 1,000,000,000,000 bytes = 10-to-the-12th bytes. Hard drive manufacturers have always specified drive capacity with standard usage which will now match what Mac OS X reports.
WIth Leopard (10.5) and previous versions of Mac OS X, Apple used the binary interpretation of terabyte, (technically a tebibyte) = 1,099,511,627,776 bytes = 2-to-the-40th bytes. Windows also uses binary interpretation.
Under Snow Leopard, drive capacity will be shown per drive specifications. For example, under OS X 10.6, a 1TB drive will appear as a 1000 GB capacity drive (but under OS X 10.5 as a 909 GB capacity drive). For additional information see support.apple.com/kb/TS2419.
What does this mean in real terms? Do I get an immediate increase in storage space?
Formatting or actual capacity does not change at all, only the reported capacity because of the change from base-2 to base-10.
Should I reformat the drives before attempting to plug in a previously 10.5 formatted unit into a 10.6 machine or vice versa?
Reformatting is not necessary at all.
What happens if I plug a 10.6 formatted unit into a 10.5 machine or vice versa?
The volume is seen normally. It is completely compatible and can be transparently moved back and forth. |
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453 |
| Only the first drive of my Fusion D400Q, D500P, R400P, or R400Q is recognized when I connect via SATA. Why? | Mar-24-10 |
|
459 |
| The performance of my drive array is significantly less than I expect. | Jun-14-11 |
| Another manufacturer's previously-installed SATA driver may be accessing a Sonnet SATA card in error causing a drive access slowdown. For example, we have seen Fusion D400QR5 performance drop from 200MB/s to under 50MB/s in such circumstances. The solution is to remove the other manufacturer's SATA driver. |
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|
955 |
| Can I use Seagate Iron Wolf drives; or Hitchai and WD drives 8TB and larger? | May-31-18 |
| Some newer drives use a hole pattern different from the traditional drive hole pattern for the bottom mounting points. The location of the bottom holes close to the connector did not change; however, the bottom holes near the middle have been removed and replaced with bottom holes close to the front of the drive.
The drives with the new bottom hole pattern include:
Seagate Iron Wolf drives (also missing the middle hole from the side mount hole troika)
Hitachi drives 8TB and larger
WD drives 8TB and larger
Incompatible mount holes
Echo 15+ Dock (side mount, but needs middle hole, so incompatible with only Seagate Iron Wolf)
Fusion F3 (bottom mount)
Fusion D400Q/R400P/D500P (bottom mount)
Fusion D800/R800 (bottom mount)
Compatible mount holes
Fusion R400S RAID (side mount)
Fusion R400 RAID USB 3 (side mount)
Fusion DX800/RX1600 (side mount) If using Iron Wolf line, must use Iron Wolf Pro with rotational vibration sensors
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