*Dear All:*
*I have bought HP ProLiant DL380 G5. The SAS Controller is Smart Array P400
(256MB).*
*I can setup FreeBSD 6.2R successfully and everything is OK. *
*However, I found that there is an amazing message in the dmesg:*
*ciss0: <HP Smart Array P400> port 0x4000-0x40ff mem
0xfde00000-0xfdefffff,0xfddf
0000-0xfddf0fff irq 18 at device 0.0 on pci6
ciss0: [GIANT-LOCKED]*
*--->**Smart Array P400 is activated by ciss0 successfully*
*da0 at ciss0 bus 0 target 0 lun 0
da0: <COMPAQ RAID 5 VOLUME OK> Fixed Direct Access SCSI-0 device
da0: 135.168MB/s transfers
da0: 419946MB (860051248 512 byte sectors: 255H 32S/T 65535C)*
*--->**The Raid 5 configuration seems ok. However, it is ONLY SCSI-0 device*
*The transfer speed is so slow... only 135.168MB/s transfers*
**
*The output message from 'diskinfo -c /dev/da0' is:*
**
*/dev/da0
512 # sectorsize
440346238976 # mediasize in bytes (410G)
860051248 # mediasize in sectors
105398 # Cylinders according to firmware.
255 # Heads according to firmware.
32 # Sectors according to firmware.
I/O command overhead:
time to read 10MB block 0.164235 sec = 0.008msec/sector
time to read 20480 sectors 20.531218 sec = 1.003msec/sector
calculated command overhead = 0.994msec/sector
*
*Is it normal? Is there anything wrong on ciss0 driver or the hardware
(Smart Array P400 Or SAS HD)?*
**
*Thanks..*
**
**
*
*
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