Hi,
Im still playing with my first LSI raid card (9271-8i, i have always used adaptec cards going back 8+ years), and noticed something weird. My test system is a supermicro 846 (4u 24bay chassis, X8 supermicro MB). I have 4 x 150gb WD Velociraptor drives ive been testing with / in raid 5. I didn't have these drives in the hot swap bays but rather had a molex power Y splitter providing power to the 4 x drives.
I wanted to image a SSD drive i have, so (with the system on) i plugged in power to the SSD drive from an extra "Y" off the one molex (to be clear there is 1 molex , goes to 1 x Y adaptors, which connects to 2x 3x sata power splitters, so total i have 6 sata power plugs, 4 of which being used by the 4x velociraptor drives).
as soon as i connected power to the SSD, the raid card starts beeping and 2 x of the VR drives went to "Unconfigured Bad" (and the raid 5 now went offline). Im assuming hooking up the ssd caused a small power spike or something that spit out an error on the other drives on that Y molex. but really LSI?? this is enough to kick 2 drives out from raid and kill my raid array!?! (no real data that matters, this is all test and fun system for now). But dang, there were many times on my older servers that i would add a drive to a y power molex while the system was running and never had a single issue (granted ive always known its not a good idea to do so)
So as a test i tried this exact scenario a few more times, and even on drives that are sitting "Unconfigured Good" it spits out "PD Sense errors" when you connect EVEN AN SSD to the same Y power as a 2nd (or 3rd , 4th ect) drive.
I hooked up my Adaptec card and did the same test, no issue, no log message..even 3 drives in a raid5, keeps on trucking..... why is the LSI card so sensitive?
dangIT!....im testing LSI bc after being on adaptec for so long many people told me LSI is where its at..this is the 2nd major red flag ive come across (1st was the inability of LSI to have more than 1 raid type on a single disk)
my questions:
1) doesn't this seem like a bit of a low tolerance for the LSI to kick the drive and kill the raid as a result of kicking the drive? (like i said my adaptec's never did this)
2) is there a way to reload the array or attempt to rebuild it in LSI MegaRaid? (i have not mastered LSI raid interface yet, on adaptec you can force an attempt at a rebuild)
thanks
Im still playing with my first LSI raid card (9271-8i, i have always used adaptec cards going back 8+ years), and noticed something weird. My test system is a supermicro 846 (4u 24bay chassis, X8 supermicro MB). I have 4 x 150gb WD Velociraptor drives ive been testing with / in raid 5. I didn't have these drives in the hot swap bays but rather had a molex power Y splitter providing power to the 4 x drives.
I wanted to image a SSD drive i have, so (with the system on) i plugged in power to the SSD drive from an extra "Y" off the one molex (to be clear there is 1 molex , goes to 1 x Y adaptors, which connects to 2x 3x sata power splitters, so total i have 6 sata power plugs, 4 of which being used by the 4x velociraptor drives).
as soon as i connected power to the SSD, the raid card starts beeping and 2 x of the VR drives went to "Unconfigured Bad" (and the raid 5 now went offline). Im assuming hooking up the ssd caused a small power spike or something that spit out an error on the other drives on that Y molex. but really LSI?? this is enough to kick 2 drives out from raid and kill my raid array!?! (no real data that matters, this is all test and fun system for now). But dang, there were many times on my older servers that i would add a drive to a y power molex while the system was running and never had a single issue (granted ive always known its not a good idea to do so)
So as a test i tried this exact scenario a few more times, and even on drives that are sitting "Unconfigured Good" it spits out "PD Sense errors" when you connect EVEN AN SSD to the same Y power as a 2nd (or 3rd , 4th ect) drive.
I hooked up my Adaptec card and did the same test, no issue, no log message..even 3 drives in a raid5, keeps on trucking..... why is the LSI card so sensitive?
dangIT!....im testing LSI bc after being on adaptec for so long many people told me LSI is where its at..this is the 2nd major red flag ive come across (1st was the inability of LSI to have more than 1 raid type on a single disk)
my questions:
1) doesn't this seem like a bit of a low tolerance for the LSI to kick the drive and kill the raid as a result of kicking the drive? (like i said my adaptec's never did this)
2) is there a way to reload the array or attempt to rebuild it in LSI MegaRaid? (i have not mastered LSI raid interface yet, on adaptec you can force an attempt at a rebuild)
thanks