On 05/09/2017 11:22 PM, Jes Sorensen wrote: > On 05/09/2017 05:16 PM, Martin K. Petersen wrote: >> >> Jes, >> >>> This is fine within the kernel, however it is not overly useful for >>> mdadm to determine which strategy to apply when syncing devices. >> >> BLKZEROOUT >> > > Trying to read the code, as this ioctl doesn't seem to be documented > anywhere I can find.... it looks like this ioctl zeroes out a device. > > It doesn't help me obtain the information I need to make a decision in > mdadm as whether to overwrite all or compare+write when resyncing a RAID > array. > What you actually want is the COMPARE AND WRITE SCSI command :-) Cheers, Hannes -- Dr. Hannes Reinecke Teamlead Storage & Networking hare@xxxxxxx +49 911 74053 688 SUSE LINUX GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: F. Imendörffer, J. Smithard, J. Guild, D. Upmanyu, G. Norton HRB 21284 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
