The release of macOS Sierra comes with Xsan 5 – which is compatible with the Quantum StorNext 5.3 filesystem. But before rushing into the upgrade, there are some things to be aware of first.
Running macOS Sierra & Server 5.2 as an XSan server (MDC) will require ALL MDC’s to be upgraded to macOS Sierra. Any MDC’s running XSan 4.x (eg: Mac OS X 10.11 or 10.10) will no longer be supported. Once the Sierra MDC connects to the SAN, it will update the metadata on the FSM and all MDC’s not running macOS Sierra & Server 5.2 will no longer connect to the SAN.
XSan 4 clients at this time will still connect to XSan 5 file systems (refer below), but this may change in coming updates.
| MDC version | Minimum client version |
|---|---|
| Xsan 5 | Xsan 41 |
| Xsan 4.1 | Xsan 4 |
| Xsan 4 | Xsan 4 |
Quote HT206807: The first time you activate an earlier Xsan volume on macOS Sierra, the Xsan file system manager (fsm) upgrades your volume’s metadata to a newer format. Once this conversion begins, you won’t be able to use this volume with Xsan MDCs running OS X 10.11 or earlier.
Older MDCs won’t be able to control Xsan volumes that are created in Xsan 5. If you attempt to start a volume that has been upgraded to or created in Xsan 5 on an older MDC, the volume won’t open. When this happens, the system will deliver an ICB alert.
Information sources:
https://support.apple.com/en-us/HT207027
https://support.apple.com/en-au/HT206807
https://support.apple.com/en-au/HT200135
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