HISI3520D SATA硬盘加载问题

在下用HISI3520D  linux-3.0.y版本加载硬盘出现如下问题：
1.不用热插拔时，开机启动提示如下：
ata1: softreset failed (1st FIS failed)
ata1: softreset failed (1st FIS failed)
ata1: softreset failed (1st FIS failed)
ata1: limiting SATA link speed to 1.5 Gbps
ata1: softreset failed (1st FIS failed)
ata1: reset failed, giving up
ata2: SATA link down (SStatus 0 SControl 300)

在/dev/下没有出现sda
2.用热插拔时，有时也加载上：
ata1: exception Emask 0x10 SAct 0x0 SErr 0x4040000 action 0xe frozen
ata1: irq_stat 0x00000040, connection status changed
ata1: SError: { CommWake DevExch }
ata1: hard resetting link
ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
ata1.00: ATA-7: Maxtor 6V080E0, VA111630, max UDMA/133
ata1.00: 160086528 sectors, multi 0: LBA48 NCQ (depth 31/32)
ata1.00: configured for UDMA/133
ata1: EH complete
scsi 0:0:0:0: Direct-Access     ATA      Maxtor 6V080E0   VA11 PQ: 0 ANSI: 5
sd 0:0:0:0: [sda] 160086528 512-byte logical blocks: (81.9 GB/76.3 GiB)
sd 0:0:0:0: Attached scsi generic sg0 type 0
sd 0:0:0:0: [sda] Write Protect is off
sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA
sda: sda1 sda2 < sda5 >
sd 0:0:0:0: [sda] Attached SCSI disk

在/dev/下有sda，sda1
用mount 也能挂载上，但是reboot后，就出现1的问题，

请教下大神们！是什么原因呀，几天了，没进展！