Re: Clariion CX4 – Failed Drive, how can i tell if Hotspare has kicked in

There is one KB article for your reference: emc250611. I copied out the main steps here:

To check whether a hot spare is actively replacing a failed disk from the Navisphere Manager:

  1. Navigate to the LUN folders.
  2. Go to the Unowned LUNS folder and expand it by clicking on the plus symbol.
  3. Select a hot spare and right-click it.
  4. Go to the properties of the hot spare.
  5. Go to disk tab and check the status of the hot spare.

If the hot spare is replacing the failed disk, the status will be displayed as Active.

Alternatively, select the disk under the hot spare and right click and select the properties. If the hot spare is invoked, it will display as Engaged under the current state and under the hot spare replacing the status will be displayed as Active.

For command line check, you may issue getdisk -hs. For example, my 1_0_8 is down, to check if HS was involved:

getdisk -hs

Bus 1 Enclosure 0 Disk 6

Hot Spare: 24567: YES

Hot Spare Replacing: 1_0_8

Bus 1 Enclosure 0 Disk 7

Hot Spare: NO

Bus 1 Enclosure 0 Disk 8

State: Removed



As you can see, the removed drive 1_0_8 is now replaced by HS 1_0_6

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Re: What does “RPS Clone” mean?

RPS stands for “Recover pipe to save”.

This is a new feature that was introduced in version 9.0

Among other things:

– Ability to clone multiple savesets in parallel (Both for CCR and non-CCR). Clone is no longer a single thread operation.

– Clone operation is more fault-tolerant. Ability to continue clone operation even if we fail to clone one of the savesets.

Unfortunately there are issues when using RPS, and this is why, as part of the troubleshooting and workaround, it is suggested for RPS to be disabled.

Hope this helps…

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Re: EMC DPE AND DAE Power Supply Question

Hi Guys

Yesterday I had a good exercise in a customer environment –> Complete power down of the building.

Setup

UPS attached to PDU 1

Public power supply on PDU 2

EMC VNX DPE attached to PDU 1 and PDU 2

DAEs attached to PDU 1 and PDU 2

So we completly cut the power from the public supply:

– Each DAE lost power on one Power supply

– DPE lost power on one Power supply

…… the system run on UPS battery for 30 minutes. After 30 minutes the UPS battery was empty and the DAEs shutdown immediatly the DPE run on its own battery for something like 30 seconds than it shutdown as well.

Before that all ESXi Hosts and its related VMs shutdown before the EMC powered down.

QUESTION

I always though that when you need to powerdown the DPE has to go down first so that no data is accepted anymore. And start the DAEs first so that they are ready for data from the DPE later on.

What we saw in this setup here was that the DAE went down first and than the DPE. In my logic this is bad because maybe the DPE wants to write data and the DAEs are already gone.

Here it did not happen because all the host were down before.

1) Is my first statement true with the correct order for shutdown and power-up?

2) Is our setup wrong or OK?

3) Is there any ways to achieve my goal (dpe shutdown first and than dae) with our setup or another setup?

4) Or is the way it went through just the right way (dae shutdown first and than dpe)?

Thanks

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Re: Failed hot spare lun

I have a VNX array which has a hot-spare lun.

We had a failure in a pool, at which time the hot spare lun took over.

However, the hot spare lun also failed, resulting in corruption.

I tried to delete the the pool, but the hot-spare lun is still marked in-use and I cannot drop it to replace the drive.

Im stuck with the hot-spare disk faulted and attempts to replace it are failing and I cannot delete the hot spare lun or raid group.

Stuck…

Related:

Failed hot spare lun

I have a VNX array which has a hot-spare lun.

We had a failure in a pool, at which time the hot spare lun took over.

However, the hot spare lun also failed, resulting in corruption.

I tried to delete the the pool, but the hot-spare lun is still marked in-use and I cannot drop it to replace the drive.

Im stuck with the hot-spare disk faulted and attempts to replace it are failing and I cannot delete the hot spare lun or raid group.

Stuck…

Related:

Re: Unity – Temporary disable hot spare policy

Dear Unity Experts,

I understand that a Unity hot spare policy is very important to protect the data on the box, but I’m now in need of the storage capacity than protection. Unlike VNX2 I can add all of the to the Pool or RAID Group, in Unity I can only add the disks to Pool with fixed RAID configuration plus hot spare.

Question: Can I have a option to temporary disable hot spare policy, configure a Pool, adding more disks in a next few weeks then enable the hot spare policy.

Thanks.

Tien.

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Re: VNX5500 – 3 drives failed and 2 hot spare drives replace them. How is that possible? can a single hot spare drive replace more than one drive?

Hello Glen,

Yesterday we accessed to the Unisphere client directly, and as you stated, the hot spares drives are replacing in a one to one basis. Maybe the process to convert the SPCollect to a Excel output has errors.

In deed, the faulted drives belong to different RAID Groups.

First Hot Spare

Second Hot Spare

The problem we see is that, one of the failed drives is vault drive, and we are not able to copy to a hot spare drive. We suppose that a vault drive cannot be copied to a hot spare drive. Is that correct?.

In the case of the vault drive, I guess is safe to replace it since the vault drives have mirrored protection, right?

Thanks!

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