are there any hint to delete gpfs-nsds with a procedure to shredder the struktur on a disk with changing pattern '00' 'FF' '00' for a legal delete of a old disksubsystem in a cluster. For any tip i am appreciate.
Pinned topic Function like mmdeldisk with schredding pattern
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Updated on 2013-03-12T15:50:50Z at 2013-03-12T15:50:50Z by SystemAdmin
SystemAdmin 110000D4XK2092 Posts
Re: Function like mmdeldisk with schredding pattern2013-03-12T15:50:50ZThis is the accepted answer. This is the accepted answer.No, there isn't anything like this in GPFS. mmdeldisk doesn't overwrite anything on the disk being deleted. If you're after something very simple, you could couple mmdeldisk with "dd if=/dev/zero of=yourdevice(or "dd if=/dev/urandom"). However, in this day and age data shredding is often tricky. Some disk controllers do thin provisioning/compression, and handle large writes of zeroes in a special way (which doesn't involve writing all of them to actual media). Some storage devices (e.g. many SSDs) are implemented as a log-structured device, where data isn't actually overwritten on a logical overwrite.
You may want to take a look at self-encrypting disks.