doc:appunti:hardware:x96_mini
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doc:appunti:hardware:x96_mini [2023/10/22 22:27] – [Connecting a 2.5" hard disk via the USB] niccolo | doc:appunti:hardware:x96_mini [2023/10/22 23:01] – [Connecting a 2.5" hard disk via the USB] niccolo | ||
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====== Connecting a 2.5" hard disk via the USB ====== | ====== Connecting a 2.5" hard disk via the USB ====== | ||
+ | I connected an **external hard disk**; specifically it is a Toshiba MQ04UBF100, 2.5 inches hard drive, SATA 3.0, **1 Tb**, using an **USB 3.0** interface. | ||
- | Disk performance | + | At first I tried to power the hard disk directly from the USB port of the X96 mini, but it turned out that the USB port **does not provide enough power**. The hard disk suddendly and randomly **disconnect and re-connect** with no reason. Here it is the relevant kernel messages displayed by the **dmesg** tool: |
+ | |||
+ | < | ||
+ | [ 526.677574@2]- usb 1-2: USB disconnect, device number 2 | ||
+ | [ 526.678631@2]- blk_update_request: | ||
+ | ... | ||
+ | [ 526.942573@3]- EXT4-fs error (device sda1): ext4_journal_check_start: | ||
+ | [ 526.942578@3]- EXT4-fs (sda1): Remounting filesystem read-only | ||
+ | [ 526.942585@3]- EXT4-fs (sda1): previous I/O error to superblock detected | ||
+ | [ 526.942612@3]d Buffer I/O error on dev sda1, logical block 0, lost sync page write | ||
+ | [ 526.983449@2]- sd 0:0:0:0: [sda] Synchronizing SCSI cache | ||
+ | [ 526.997855@2]- sd 0:0:0:0: [sda] Synchronize Cache(10) failed: Result: hostbyte=DID_NO_CONNECT driverbyte=DRIVER_OK | ||
+ | [ 527.796877@2]- usb 1-2: new high-speed USB device number 4 using xhci-hcd | ||
+ | [ 527.938266@2]- usb 1-2: New USB device found, idVendor=0480, | ||
+ | [ 527.938278@2]- usb 1-2: New USB device strings: Mfr=2, Product=3, SerialNumber=1 | ||
+ | [ 527.938282@2]- usb 1-2: Product: External USB 3.0 | ||
+ | </ | ||
+ | |||
+ | The solution was to use a **externally powered USB hub**. | ||
+ | |||
+ | I measured the disk performance | ||
< | < | ||
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< | < | ||
- | Timing buffered disk reads: 102 MB in 3.03 seconds = 33.71 MB/sec | + | Timing buffered disk reads: 102 MB in 3.03 seconds = 33.71 MB/sec |
</ | </ | ||
+ | This is about **270 Mbit/s**, which is near the 280 Mbps of the USB 2.0 //High Speed// specifications. This means that both the USB ports are actually USB 2.0. | ||
doc/appunti/hardware/x96_mini.txt · Last modified: 2023/10/22 23:32 by niccolo