DataCore SANsymphony-V PSP4 Update: Critical Issue and Resolution
Yesterday, I received an email from DataCore announcing Update 2 for SANsymphony-V PSP4, which addresses a critical issue affecting all releases since version 9.0 PSP3. According to the release notes, a situation can arise where storage space reclamation and migration can occur simultaneously, leading to a scenario where two Storage Allocation Units (SAU) point to the same disk offset. This can cause the disk pool to be marked offline.
The issue primarily affects customers who use DataCore Auto-Tiering, but as a precautionary measure, DataCore recommends that all customers update to the latest release to avoid any potential disruptions. The update can be downloaded from the DataCore Support Portal, and it is recommended to update online if you have a mirrored DataCore environment.
Patrick, a blogger who specializes in DataCore technology, provided additional insight into the issue, stating that SAU migration can also occur in other situations, such as adding or removing disks to or from a disk pool. He also noted that space reclamation begins once a virtual disk is deleted or when SSV detects all zeroed virtual disks. This means that deleting a virtual disk and adding a physical disk to a pool can also lead to an offline disk pool.
The issue is significant because it can cause downtime for customers who rely on their storage systems for critical operations. However, by updating to the latest release of SANsymphony-V PSP4, customers can avoid this issue and ensure that their storage systems remain online and available.
In conclusion, all DataCore customers should prioritize updating to the latest SANsymphony-V PSP4 release as soon as possible to avoid any potential disruptions caused by the critical issue. The update is available for download from the DataCore Support Portal, and it can be done online if you have a mirrored DataCore environment. By taking this proactive step, customers can ensure that their storage systems remain reliable and efficient, allowing them to focus on their core business activities without interruptions.