First a little background, I'm running b130, I have a zpool with two
Raidz1(each 4 drives, all WD RE4-GPs) "arrays" (vdev?). They're in a
Norco-4220 case ("home" server), which just consists of SAS backplanes
(aoc-usas-l8i ->8087->backplane->SATA drives). A couple of the drives are
showing a number of hard/transport/media errors (weekly scrubs are fine) and
I'm guessing it can explain some of the slower throughput I've been seeing
lately (errors are increasing more rapidly).
I do have a Hotspare for the zpool and I'm thinking of doing an advanced
replacement (RMA) one at a time to minimize risk/downtime.
Here's the first question, since the current drive is working, when I choose to
replace with the Hotspare, does the current drive cease to have data written to
it? Eg, if the hotspare fails, does a resliver need to occur on the current
drive?
Second question, is there a way to power-down the current drive while the
system is running? I mean, by command-line, which I would think would be more
graceful than my current plan of pulling the drive. The reason I ask is I'm
only semi-confident I know the physical layout of the (logical) drive ordering.
Last question, is there another way to see HD serial#s? Iostat doesn't show
the serial#s. I'm willing to power down the system to pull the slots I think
the drives are in to retrieve the serials, it would just be nice not to since
my home network depends on a lot of the services (AD/DHCP/DNS) that run on the
server. Though, if I do have to power it down, its not the end of the world.
Example Iostat -En output:
c8t6d0 Soft Errors: 0 Hard Errors: 160 Transport Errors: 213
Vendor: ATA Product: WDC WD2002FYPS-0 Revision: 5G04 Serial No:
Size: 2000.40GB <2000398934016 bytes>
Media Error: 50 Device Not Ready: 0 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
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