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Msteel

globalSAN and power failures

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Well, let me say first off that our X16 is on a UPS, as it should be.

But there have been a couple of times when nobody could mount SANmp volumes and when I investigated, the iSCSI was disabled. This last time was after a known power outage, and I suspect that the UPS ran out, the X16 went down (in a disorderly state) as a result, and came back up with iSCSI disabled. So, does anybody know:

1) If there's a way for the X16 to find out that the UPS is about to go down and shut itself down nicely.

2) If there's a way ensure that iSCSI comes on in an enabled state after a shutdown. I believe that iSCSI was set to be enabled at next startup, but couldn't say for sure...

Matt

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Guest Loring
Well, let me say first off that our X16 is on a UPS, as it should be.

I am happy to hear that you are using a UPS to protect your storage. :D This is often overlooked in maintaining a healthy SAN environment.

But there have been a couple of times when nobody could mount SANmp volumes and when I investigated, the iSCSI was disabled. This last time was after a known power outage, and I suspect that the UPS ran out, the X16 went down (in a disorderly state) as a result, and came back up with iSCSI disabled. So, does anybody know:

1) If there's a way for the X16 to find out that the UPS is about to go down and shut itself down nicely.

The globalSAN X-16 iSCSI target does not currently support communication with UPS devices. :(

2) If there's a way ensure that iSCSI comes on in an enabled state after a shutdown. I believe that iSCSI was set to be enabled at next startup, but couldn't say for sure...

There is indeed a setting to ensure that the iSCSI service starts automatically. To verify that this is enabled:

1. Log into your globalSAN X-16 via a web browser window.

2. Navigate to the General > Power tab.

3. Under iSCSI Target Boot Options, ensure that the iSCSI target enabled at next boot: drop down is set to Yes.

4. Click the APPLY button.

Regards,

Loring

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There is indeed a setting to ensure that the iSCSI service starts automatically. To verify that this is enabled:

1. Log into your globalSAN X-16 via a web browser window.

2. Navigate to the General > Power tab.

3. Under iSCSI Target Boot Options, ensure that the iSCSI target enabled at next boot: drop down is set to Yes.

4. Click the APPLY button.

Loring

Well, I have verified that this setting is correct. I can't say for sure how it was set during the outage, although I don't think I've ever set it to "disabled." We'll see what happens next time. Or I'll do a controlled test to see what happens if the UPS runs out.

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