PowerEdge 2900 iSCSI Performance Problems w/ FreeBSD
Got a new storage server, it’s a PE2900 from Dell. Installed FreeBSD 7.2 on it, rebuilt the kernel with all the updates and included:
options iscsi_initiator
connected to the iSCSI target across the LAN, then I used:
dd if=/dev/zero of=/mnt/testiscsi/file.out bs=65536
to test the speeds after mounting it. I observed horrific speeds (in the range of 300-500KB/s).
To make a long story short, I discovered that using the extra Intel NIC I put in the system’s PCI slots fixed the problem. So I tried to upgrade firmware, but they all seem to be up to date. Looks like I’ll be disabling them in the BIOS and ordering some more Intel cards.
Damn Dell for putting those crappy Broadcoms in there.
Hitachi Simple Modular Storage 100 Review
I hate it. I didn’t buy it, someone else did and I got stuck “using” it, then selling it.
It came preconfigured with a bunch of 300GB SAS 15K RPM drives in it for use with iSCSI. To me that makes no sense. What’s the point of the HUGELY fast drives in something that at MOST will be reading/writing at 400MB/s? Worthless design.
So I decided to change out the SAS drives for some (much) larger SATA ones, but figured I’d insert them when/if I order them. I remove the disks that came in it (which oddly had threadlock on every screw) then boot it, only to find it no longer knows its serial number.
It seems the system configuration is stored on the disks. The system cannot be upgraded. So, if it doesn’t support a huge amount of storage and it can’t possibly use the speed of the array inside, what’s the point of owning it? As I understand they go for around $7-10K configured this way.
A SAN that’s expandable and usable for WAY more storage is probably not too far out of that price range. If you bought one of these, you’ll be mad at yourself for it. If you’re going to buy one of these after reading this, I’ll be mad at you.
