Author Archives: Naz Snidanko

HPE 3PAR Adaptive Optimization configuration demystified

Adaptive Optimization is disk tiering technology within 3PAR OS, which automatically moves the most frequently accessed data blocks to the fastest disks and infrequently accessed data blocks of data to slower disks. I will not try to recite official documentation … Continue reading

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3PAR iSCSI Delayed ACK read or write performance issues

I’ve noticed a few people running iSCSI 3PARs with Delayed ACK enabled and experiencing latency on their datastores. Here’s what happens when you disable it (SSD backed datastore): Before and after: VMware KB about it: https://kb.vmware.com/kb/1002598 I suggest to use … Continue reading

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Brocade 300 password recovery and factory reset

Let’s say you purchase a couple of 300s on the Ebay and someone forgot to reset config but you can’t get in as all default passwords got changed. Here’s what we need to do:

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vCenter Server Appliance 6.0 bug – Intermediate authentication issues – Native platform error -1765328378

Another mysterious bug from VMware – intermediate authentication failures. Symptoms: I’ve noticed some of the backup jobs were failing because Veeam failed to log in to vCenter. If you’re familiar with Veeam software – you define backup account per vCenter … Continue reading

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3PAR with AO and SSDs. How much do I need?

Most of the people involved with storage deal on daily basis with performance and capacity monitoring. There are two metrics which everyone cares the most: size and IOPS. Of course, latency, queue depth and many more have significant impact as well. If you … Continue reading

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AWS Certified Solutions Architect – Associate Exam 50% off

Amazon has amazing promotion for AWS Certified Solutions Architect Associate exams – 50% off! So here’s the catch – you will get random questions which help Amazon in future AWS exams. These “test” questions are not graded and do not … Continue reading

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3PAR 3.2.2 MU3 and Veeam B&R 9.0 Update 2 – integration bug

Latest 3PAR firmware 3.2.2 MU3 breaks SAN integration with Veeam Backup and Replication. Issue affects all versions, including version 9 Update 2. Symptoms You job will fail with “User authentication failed” error:

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ESXi 5.5/6.x bug HPE CIM – /var/run/sfcb inode table of its ramdisk is full

Another bug from VMware/HPE – unfortunately we don’t have public KB available at this point. As per our conversation with VMware engineer this issue affects both ESXi 5.5 and ESXi 6.x hosts. I suspect VMware sfcb service fails to clear … Continue reading

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Alert! Alerte! Achtung! Critical bug in vSphere 6

Backing up VMs in vSphere 6 can cause data loss in your backups! Earlier I wrote about critical bug with vSphere 5.5 update 3 related to backups which was absolutely unacceptable and here we go again… Here’s symptoms from VMware’s … Continue reading

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3PAR WSAPI via Powershell

Earlier I’ve demonstrated how to use 3PAR CLI with Powershell. In this example I will show how to work with 3PAR’s WSAPI via Powershell and poll last time remote copy group was synchronized (i use Last Sync date from first … Continue reading

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