https://community.hpe.com/t5/disk/bad-drives/m-p/3565519#M5551 The drive must have developed a bad spot, which the low-level format worked around. The format will simply skip bad areas on the disk.<BR /><BR />However, bad areas like that normally "grow" with time, and it's very likely that the drive will fail again as this occurs.<BR /><BR />I would replace the drive(s) as soon as possible, but you decide to give it a go, keep an eye on it for errors. Once it starts generating errors again, you should replace it.<BR /><BR />As always, keep good backups!<BR /><BR />Good luck,<BR /><BR />Vince Sun, 19 Jun 2005 07:23:52 GMT Vincent Fleming 2005-06-19T07:23:52Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565514#M5546 I have a couple of bad A5633A HD's that failed the dd command and failed in STM. Since they were bad I did a mediainit on them for no reason and it seems to have fixed them?? After the mediainit they passed STM tests, the dd test and the ODE test. Are these drives going to be okay? Any info would be much appreciated. Thanks. Thu, 16 Jun 2005 13:38:31 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565514#M5546 Dane Van Steenwyk 2005-06-16T13:38:31Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565515#M5547 What about the #diskinfo /dev/rdsk/cXtXdX ==&gt;output . Does it showing the 18GB ...<BR />Check the #ioscan -fnC disk ==&gt;output as well Fri, 17 Jun 2005 00:25:47 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565515#M5547 KVK 2005-06-17T00:25:47Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565516#M5548 diskinfo shows 18GB Seagate number is correct, ioscan shows 18GB CLAIMED. All looks good but it just scares me that they all tested BAD at first then after the mediainit all is good?? Fri, 17 Jun 2005 09:05:33 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565516#M5548 Dane Van Steenwyk 2005-06-17T09:05:33Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565517#M5549 Hi,<BR /><BR />mediainit is a low-level format of the hard disk. Seems to have repaired all the logical erros with the drive.<BR /><BR />Should work fine...<BR /><BR />~Suraj Fri, 17 Jun 2005 10:56:12 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565517#M5549 Suraj Singh_1 2005-06-17T10:56:12Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565518#M5550 Check the DD output as well command as follows<BR /><BR />#dd if=/dev/rdsk/cXtXdX of=/dev/null bs=512k<BR /><BR />If the command is ok ends with no error then your disk is alright <BR /><BR />You can go ahead for other activity at your disk<BR /> Sat, 18 Jun 2005 00:29:30 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565518#M5550 KVK 2005-06-18T00:29:30Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565519#M5551 The drive must have developed a bad spot, which the low-level format worked around. The format will simply skip bad areas on the disk.<BR /><BR />However, bad areas like that normally "grow" with time, and it's very likely that the drive will fail again as this occurs.<BR /><BR />I would replace the drive(s) as soon as possible, but you decide to give it a go, keep an eye on it for errors. Once it starts generating errors again, you should replace it.<BR /><BR />As always, keep good backups!<BR /><BR />Good luck,<BR /><BR />Vince Sun, 19 Jun 2005 07:23:52 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565519#M5551 Vincent Fleming 2005-06-19T07:23:52Z https://community.hpe.com/t5/disk/bad-drives/m-p/3565520#M5552 The dd test worked fine so I am just going to continue using the drive but I will keep an eye on it. Thanks for the input guys! Mon, 20 Jun 2005 09:13:50 GMT https://community.hpe.com/t5/disk/bad-drives/m-p/3565520#M5552 Dane Van Steenwyk 2005-06-20T09:13:50Z