As a result, boot from SAN can greatly reduce the time required for server recovery. Do you have enough physical capacity in your array to support this? This can be mitigated to some extent by moving page-files to local disks or installing more memory.
Migrating OS to BFS in some situations can have a negative impact on the array or fabric switches potentially causing contention check ISL fan-in ratios. Be mindful of boot storms after an outage or in VDI deployments, you may have to selectively boot tier1 apps in phases bear in mind tier 1 application dependencies such as DNS, LDAP or Active Directory servers, they need to be started first. Review your tier 1 app service dependencies and their IOPs requirements see point above for throughput considerations.
For the initial boot, restrict the host to a single path connection on the 3PAR array. Ensure appropriate zoning techniques are applied see my best practice guide If you are using clustering ensure nodes in a cluster have sole access to the boot LUN mapping , using LUN masking array side. Select a boot device from discovered targets. Then just save changes and exit.
Press Esc to return to the previous menu. Select Topology. Select Fabric Point to Point for fabric configurations. Select FC-AL for direct connect configurations. Press Esc to return to the previous menu if you need to set up other adapters. When you are Finished, press x to exit and reboot.
Privacy policy. See the Setup log files for more information. Windows is unable to install to a RAW disk with multiple physical paths. If the boot LUN is presented on a single physical path or if the boot LUN has already been initialized prior to installing Windows, Setup will proceed as expected.
Configure a single path to the boot LUN when installing Windows. This method is ideal for scenarios where physically disconnecting the additional SAN connections isn't possible or is difficult.
If the disk that is referenced is on the SAN, it could indicate a latency issue. If an Event ID 51 is shown, this indicates that Memory Manager was attempting to copy data to or from memory and had a problem. Another indicator of pagefile latency issues is if the Windows server has a system failure, and either of the following error messages are displayed on a blue screen:. A possible resolution is to place the pagefile on the host's local hard disk.
Windows needs reliable access to the pagefile as data is paged in or out of memory. Having the pagefile local to the host guarantees that access is not influenced by other devices and hosts on the SAN. A Memory. For information about how to configure your computer for a crashdump, see Windows Help. There are several ways to resolve the preceding problems. The first method is to try and correlate the time with any events that are occurring on the SAN.
Another example is if HostB produces errors whenever HostA is rebooted. These can often be corrected by reconfiguring the SAN, and this requires the assistance of the hardware vendor. Any type of latency issues might be resolved by placing pagefile on the Windows server's local hard disk, but again, this disables the creation of a memory dump.
A key point to understand is that the hardware vendor of the SAN will have the most information about the proper configuration, and must be the first point of contact for all configuration questions and concerns.
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