Hi,
I have the following disk:
on a cheap-cheap-cheap 4 port SATA controller:
I really cannot find any answer to the following:
Thanks!
I have the following disk:
Code:
# gpart show ada0
=> 34 3907029101 ada0 GPT (1.8T)
34 2014 - free - (1M)
2048 3907026944 1 freebsd-ufs (1.8T)
3907028992 143 - free - (71k)
on a cheap-cheap-cheap 4 port SATA controller:
Code:
atapci1: <SiI 3114 SATA150 controller> port 0xec00-0xec07,0xe880-0xe883,0xe800-0xe807,0xe480-0xe483,0xe400-0xe40f mem 0xfebffc00-0xfebfffff irq 16 at device 0.0 on pci6
ata3: <ATA channel> at channel 0 on atapci1
ata4: <ATA channel> at channel 1 on atapci1
ata5: <ATA channel> at channel 2 on atapci1
ata6: <ATA channel> at channel 3 on atapci1
....
ada0: 150.000MB/s transfers (SATA 1.x, UDMA5, PIO 8192bytes)
ada0: 1907729MB (3907029168 512 byte sectors: 16H 63S/T 16383C)
ada0: Previously was known as ad14
I really cannot find any answer to the following:
- Why does the disk start on the 34 sector? It should not start on 0 sector?
- How can I make the disk 4k aligned? Do I have to consider the 34 as the beginning of the disk? If this shows does this mean that
Code:
2048 3907026944 1 freebsd-ufs (1.8T)
- I have read in many places that a cheap RAID controller uses the last sector of a disk to store the magic data. How can I verify that?
Thanks!