This is a recent bit of code by Justin cc'ed, so he's likely the best person to
investigate this one.
Regards
Steve
----- Original Message -----
From: "Dmitryy Makarov" <suppor...@ukr.net>
To: <freebsd-current@freebsd.org>
Sent: Friday, September 13, 2013 12:16 PM
Subject: ZFS secondarycache on SSD problem on r255173
Hello, FreeBSD Current.
Have some trouble with adding SSD drive as secondarycache device on 10.0-CURRENT FreeBSD 10.0-CURRENT #1 r255173 :
SSD INTEL SSDSC2BW180A4
dmesg:
ada1 at ahcich2 bus 0 scbus4 target 0 lun 0
ada1: <INTEL SSDSC2BW180A4 DC02> ATA-9 SATA 3.x device
ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
ada1: Command Queueing enabled
ada1: 171705MB (351651888 512 byte sectors: 16H 63S/T 16383C)
ada1: quirks=0x1<4K>
ada1: Previously was known as ad8
# diskinfo -v /dev/ada1
/dev/ada1
512 # sectorsize
180045766656 # mediasize in bytes (167G)
351651888 # mediasize in sectors
4096 # stripesize
0 # stripeoffset
348861 # Cylinders according to firmware.
16 # Heads according to firmware.
63 # Sectors according to firmware.
BTDA326504N51802GN # Disk ident.
Creating partition and adding:
# gpart create -s gpt ada1
# gpart add -t freebsd-zfs -s3G -l zil0 ada1
# gpart add -t freebsd-zfs -l cache0 ada1
# zpool add disk1 log /dev/gpt/zil0
# zpool add disk1 cache /dev/gpt/cache0
After that have:
log
gpt/zil0 ONLINE 0 0 0
cache
gpt/cache0 ONLINE 0 0 0 block size: 512B configured, 4096B native
But why? ZFS can't properly set sector size for cache device (quirks=0x1<4K>)?
And have some strange behavior with ZIl partition on the same SSD - everything works!
Okay, was trying to do some workaround with GNOP:
# gnop create -S4096 /dev/gpt/cache0
# zpool add disk1 cache /dev/gpt/cache0.nop
Seems to be OK
cache
gpt/cache0.nop ONLINE 0 0 0
But after reboot pool has
status:One or more devices are configured to use a non-native block size.
Expect reduced performance.
cache
gptid/39e40c33-1c4d-11e3-ac20-002590aa9548 ONLINE 0 0 0 block size: 512B configured, 4096B native
And no gnop parts was found, and even gpart (in /dev/gpart)
# gnop status
# gnop: Command 'status' not available.
# gpart show -l ada1
=> 34 351651821 ada1 GPT (167G)
34 6 - free - (3.0k)
40 6291456 1 zil0 (3.0G)
6291496 345360352 2 cache0 (164G)
351651848 7 - free - (3.5k)
# ls /dev/gpt/cache*
zsh: no matches found: /dev/gpt/cache*
Please, help to deal with this problem.
Or what else information can be useful to find out this trouble.
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