Re: dummy scsi read or scsi command periodically for external USB Hard Disk

2014-07-07 Thread Lars Melin
On 2014-07-07 22:39, loody wrote: hi David: 2014-07-07 23:06 GMT+08:00 David Laight : From: Lars Melin ... sgread is not included in BusyBox but you should have "touch". Create a dummy file on the disk and let cron touch it every 4 minutes. You don't need 'touch' a s

Re: dummy scsi read or scsi command periodically for external USB Hard Disk

2014-07-07 Thread Lars Melin
On 2014-07-07 21:37, loody wrote: hi Bryn: 2014-07-07 17:20 GMT+08:00 Bryn M. Reeves : On Sun, Jul 06, 2014 at 01:18:03AM +0800, loody wrote: hi all: we met a USB Hard Disk that will go to suspend if host stop sending scsi command over 5mins. To save the IO, kernel will keep the file