>> I think one of the important design decisions that needs to be made >> early on is whether it is possible to directly access some storage >> that can be updated with small random writes (either a separate flash >> LUN on the device, or a section of the disk that is formatted for 4kB >> sectors without SMR write requirements). > > This would be nice, but I looking more generally to what I call > 'single disk' systems. Several more complicated FSs use a separate > flash drive for this purpose, but ext4 expects 1 vdev, and thus only > one type of media (agnostic). We have hybrid HDD that have flash on > them, but the lba space isn't separate, so the FS or the DM couldn't > very easily treat them as 2 devices. > Adrian, What if vdev that has been exposed to ext4 composed out of md device instead of regular block device ? In other words, how do you see that these changes in EXT4 file system apply on software RAID array of SMR drives ? --Alireza -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
