With following Mike's suggestions it worked.
>>>> could you please change this line
>>>> if (mpii_req_cfg_page(sc, addr, 0, &hdr, 1, vpg, pagelen) != 0) {
>>>>
>>>> to
>>>> if (mpii_req_cfg_page(sc, addr, MPII_PG_POLL, &hdr, 1, vpg,
pagelen) != 0) {
>>>>
>>> and one more:
>>>
>>> this:
>>> if (mpii_req_cfg_header(sc, MPII_CONFIG_REQ_PAGE_TYPE_RAID_VOL, 0,
>>> addr, 0, &hdr) != 0)
>>> to:
>>> if (mpii_req_cfg_header(sc, MPII_CONFIG_REQ_PAGE_TYPE_RAID_VOL, 0,
>>> addr, MPII_PG_POLL, &hdr) != 0)
mpii0 at pci2 dev 0 function 0 "Symbios Logic SAS2008" rev 0x02: apic 0
int 16 (irq 15)
scsibus0 at mpii0: 42 targets
sd0 at scsibus0 targ 1 lun 0: <Dell, Virtual Disk, 1028> SCSI4 0/direct
fixed
sd0: 237824MB, 512 bytes/sec, 487063552 sec total
ses0 at scsibus0 targ 10 lun 0: <DP, BACKPLANE, 1.07> SCSI3 13/enclosure
services fixed
ses0: unable to read enclosure configuration
# scsi -f /dev/rsd0c -m 8
IC: 0
ABPF: 0
CAP: 0
DISC: 0
SIZE: 0
WCE: 1
MF: 0
RCD: 0
Demand Retention Priority: 0
Write Retention Priority: 0
Disable Pre-fetch Transfer Length: 65535
Minimum Pre-fetch: 0
Maximum Pre-fetch: 65280
Maximum Pre-fetch Ceiling: 65535
FSW: 0
LBCSS: 0
DRA: 0
Vendor-specific: 0
NV_DIS: 0
Number of Cache Segments: 15
Cache Segment Size: 0
how to manipulate write cache policy?
Lukasz
