I setup iSCSI boot for blade server. I carefully read VMware kb: VMware KB: Installing or upgrading to ESXi 5.1 best practices
But it's not clear at all:
When booting from a local disk or SAN/iSCSI LUN, a 5.2GB disk is required to allow for the creation of the VMFS volume and a 4GB scratch partition on the boot device. If a smaller disk or LUN is used, the installer attempts to allocate a scratch region on a separate local disk.
Can anyone shed a light, what is minimal disk size for iscsi boot lun ?
I created 10Gb lun and see the following partitions:
6. VMware Diagnostic -- 2.5Gb
7.Legacy MBR -- 4Gb
8. VMFS -- 2.62 Gb
What is purpose of this small vmfs and diagnostic partitions ?
As I read VMware docs, I shouldn't put scratch and core dumps (diagnostic partition) on the iSCSI boot LUN.
What is the best way to do that and where ?
But I already have two SAS disks in raid1.
Can I use this local disk for scratch and coredumps ?
I will use memory reservation for VMs, there will be no any memory overuse.
If I will re-assign this esx profile to another blade server with the same hardware, will be there any issues with another local disk ?
Another disk will have another ids, local datastore name, etc.
ESX5.5
Thanks