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Chromebook自带存储很小,外置存储卡就当硬盘来用了,当然是越大越好。新买的Sandisk存储卡大小是64G,号称80Mb/s读取速度
替换旧内存卡时,遇到问题,如何正确的卸载旧卡?警告有写入,尝试卸载报错。 如果关机直接换卡,开机会就入紧急模式,不能正常进入系统。 没搞清楚,最后用Gparted对卡格式化,格式化完就是未挂载状态,拔掉换新。 新卡默认格式是exfat,格式化时选择了ext4,以后不想再用ntfs了(编码问题很烦人)。 新卡挂载成功,但提示权限不够
sudo chown -R chrx /media/d
新卡读写测试,因为旧卡没做测试,所以没有对比,先用着吧。
$sudo hdparm -t /dev/mmcblk1 /dev/mmcblk1: Timing buffered disk reads: 64 MB in 3.07 seconds = 20.83 MB/sec $sudo hdparm -T /dev/mmcblk1 /dev/mmcblk1: Timing cached reads: 2248 MB in 2.00 seconds = 1123.82 MB/sec $sudo dd if=/dev/mmcblk1 of=/tmp/output bs=8k count=10k; sudo rm -f /tmp/output 记录了10240+0 的读入 记录了10240+0 的写出 83886080字节(84 MB)已复制,3.86676 秒,21.7 MB/秒
测试方法参考:Test performance of a variety of microSD cards on Raspberry Pi - sequential and random read/write · Issue #7 · geerlingguy/raspberry-pi-dramble
The text was updated successfully, but these errors were encountered:
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Chromebook自带存储很小,外置存储卡就当硬盘来用了,当然是越大越好。新买的Sandisk存储卡大小是64G,号称80Mb/s读取速度
替换旧内存卡时,遇到问题,如何正确的卸载旧卡?警告有写入,尝试卸载报错。
如果关机直接换卡,开机会就入紧急模式,不能正常进入系统。
没搞清楚,最后用Gparted对卡格式化,格式化完就是未挂载状态,拔掉换新。
新卡默认格式是exfat,格式化时选择了ext4,以后不想再用ntfs了(编码问题很烦人)。
新卡挂载成功,但提示权限不够
新卡读写测试,因为旧卡没做测试,所以没有对比,先用着吧。
测试方法参考:Test performance of a variety of microSD cards on Raspberry Pi - sequential and random read/write · Issue #7 · geerlingguy/raspberry-pi-dramble
The text was updated successfully, but these errors were encountered: