SSD write speed issues

[Zafer Aydoğan <zafer%aydogan.de@localhost>]

Hello List,

I am experiencing slow write speeds with a new server using an SSD drive.
I'm running the latest current 6.99.49 (amd64) and I'm getting
only about 8 MB/s write speed. I'm expecting > 300 MB/s of write speed.

The relevant parts of the dmesg:

pci0 at mainbus0 bus 0: configuration mode 1
pci0: i/o space, memory space enabled, rd/line, rd/mult, wr/inv ok

ahcisata0 at pci0 dev 17 function 0: vendor 0x1022 product 0x7801 (rev. 0x40)
ahcisata0: interrupting at ioapic0 pin 19
ahcisata0: 64-bit DMA
ahcisata0: AHCI revision 1.30, 1 port, 32 slots, CAP
0xf733ff00<PSC,SSC,PMD,FBSS,SPM,ISS=0x3=Gen3,SCLO,SAL,SALP,SMPS,SSNTF,SNCQ,S64A>
atabus0 at ahcisata0 channel 0

ahcisata0 port 0: device present, speed: 6.0Gb/s
wd0 at atabus0 drive 0
wd0: <SanDisk SSD i110 32GB>
wd0: drive supports 1-sector PIO transfers, LBA48 addressing
wd0: 30533 MB, 62037 cyl, 16 head, 63 sec, 512 bytes/sect x 62533296 sectors
wd0: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd0(ahcisata0:0:0): using PIO mode 4, DMA mode 2, Ultra-DMA mode 6
(Ultra/133) (using DMA)


Any ideas ?


Cheers,
Zafer