SATA-3 disk attaches as SATA-1?

O

oliver@

Developer
Hi,

Anyone has any idea what the SATA-3 disk is attaching as SATA-1?
It is used via eSATA and is the only disk on this two-port controller.

Code: 
ada6 at ahcich0 bus 0 scbus6 target 0 lun 0
ada6: <Hitachi HDS5C3020BLE630 MZ4OAAB0> ATA-8 SATA 3.x device
ada6: Serial Number *********************
ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
ada6: Command Queueing enabled
ada6: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada6: Previously was known as ad16

Code: 
ahci0: <ASMedia ASM1061 AHCI SATA controller> port 0xc050-0xc057,0xc040-0xc043,0xc030-0xc037,0xc020-0xc023,0xc000-0xc01f mem 0xdf110000-0xdf1101ff irq 17 at device 0.0 on pci3
ahci0: AHCI v1.20 with 2 6Gbps ports, Port Multiplier supported
ahcich0: <AHCI channel> at channel 0 on ahci0
ahcich1: <AHCI channel> at channel 1 on ahci0
 
Are there different types of eSATA cables? Never heard of that. eSATA was even standardized with SATA 2.x so it can't be an SATA 1.x cable ;)

It also changes from time to time:

Code: 
Apr  9 18:20:14 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
Apr  9 22:18:40 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
Apr  9 22:22:14 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
Apr  9 22:28:57 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
Apr  9 22:35:37 reis kernel: ada6: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
Apr  9 22:43:39 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)
Apr 11 19:17:46 reis kernel: ada6: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
Apr 11 20:24:49 reis kernel: ada6: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
Apr 12 02:27:17 reis kernel: ada6: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
Apr 13 21:23:05 reis kernel: ada6: 150.000MB/s transfers (SATA 1.x, UDMA6, PIO 8192bytes)

And I also attached the harddisk two times on the internal intel SATA 3 controller with an SATA->eSATA converter shield:
Code: 
Apr  7 18:46:14 reis kernel: ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
Apr  7 18:52:13 reis kernel: ada1: 300.000MB/s transfers (SATA 2.x, UDMA6, PIO 8192bytes)
 
True, not sure about eSATA itself. But SATA cables do have (or don't have at all) a shielding which make cause a problem. Also some low cost cables did cause a trouble after a while (or when they were reused frequently and bent differently each time).

Do you see that speed flapping when disks are connected directly to the internal controller ?
 
Hard to tell... the internal-controller ports are all filed up... I would need to degrade a RAID to check this.
 
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