Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
I have replication set up between two boxes with drbd over a crossover cable using protocol C. I have /dev/nb0 mounted at /mnt/nb0 on the primary box, which is then shared via Samba3. I've been testing the setup with an app on a third box running Win2K that creates random files on the Samba share as fast as it can. In order to simulate a failure, I tried rebooting the drbd secondary box. The problem is that when the secondary comes back up and drbd initiates a sync, the Samba share seems to hang (i.e. the app on the Win2K box can't create any files) until the syncing completes. Is this normal? From what I've read, the drbd device on the primary should perform normally during a sync.
Some info about my setup:
Both boxes have two hard drives: /dev/hda contains OS, /dev/hdb is for data
Both running Debian precompiled kernel 2.4.26-1-686
Both have two NICs: eth0 for network connection, eth1 for direct crossover connection
The NICs connected via crossover have negotiated 100baseTx-FD
drbd 0.6.12-3
Samba 3.0.2a-Debian
Results of `hdparm -i /dev/hdb` on primary:
Model=WDC WD2500JB-00EVA0, FwRev=15.05R15, SerialNo=WD-WMAEH2560976
Config={ HardSect NotMFM HdSw>15uSec SpinMotCtl Fixed DTR>5Mbs FmtGapReq }
RawCHS=16383/16/63, TrkSize=57600, SectSize=600, ECCbytes=74
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
IORDY=on/off, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2 udma3 udma4 udma5
AdvancedPM=no WriteCache=enabled
Drive conforms to: device does not report version:
Results of `hdparm -i /dev/hdb` on secondary:
Model=IBM-DTTA-371440, FwRev=T71OA70B, SerialNo=WK0WKFD7340
Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=34
BuffType=DualPortCache, BuffSize=462kB, MaxMultSect=16, MultSect=16
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=28229040
IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2
AdvancedPM=no WriteCache=enabled
Drive conforms to: ATA/ATAPI-4 T13 1153D revision 17: 1 2 3 4